Permit to Work & Site Safety Lab SITE-501
Permit selector for 15 site activities, 5x5 risk assessment, LOTO and prove-dead simulator, hot work permit check and a 3D/4D SIMOPS site day.
ENGINEERING VIRTUAL LABS
Design. Calculate. Verify. Comply.
All engineering labs
Every MEPVirtual module in one place, grouped by discipline. Open “Explore inside” on any card to see its tools and topics before you open it.
MEPVirtual is a free set of interactive engineering labs, calculators and reference tools for electrical, ELV, HVAC, plumbing and fire systems, built from real project work in the Gulf, Australia and New Zealand. Nothing is locked, nothing needs an account, and every lab shows its formulas, its assumptions and its limits rather than returning a number you cannot check.
Most modules run in 2D, 3D and 4D, and several go to 5D with cost and carbon, so you can watch a system behave, step through an assembly sequence or play a fault out in milliseconds instead of reading about it. Coverage runs from switchgear design and IEC 61439 verification, busbar risers, wiring diagrams, cable and containment sizing, earthing and lightning protection, generators, UPS, central battery systems and solar PV, through HVAC plant, diagnostics and commissioning, to CCTV, BMS, structured cabling, public address and fire alarm design.
Authority routes are covered for DEWA, SEWA, ADDC, AADC, EtihadWE, Kahramaa and SEC, alongside AS/NZS, IEC, BS EN, NFPA and ASHRAE practice. The Exam Lab carries timed licensing practice for DEWA, SEWA, Abu Dhabi, EtihadWE, Australian AS/NZS 3000, NZ EWRB registration and CPEng readiness, and the Copilot answers from a library of engineering questions and real site fault cases. Start with a module card, open “Explore inside” to see what a lab contains, or ask the Copilot if you are not sure where to begin.
- 94interactive modules
- 5disciplines covered
- 40+codes and standards
- 8regions and authorities
- 3,800+Q&As and site cases
- Freeno account needed
Site Engineering Track (7 modules)
FC & Shop Drawings Lab SITE-502
FC vs shop drawings, title block and ISO 19650 number decoder, spot-the-difference review, superseded prints and a 3D FC/shop/as-built void.
Material Submittal & Inspection Request Tracker SITE-503
Live material submittal and IR logs with review periods, approval gate, site decision game, S-curve dashboard and 3D inspection status.
Snag & Punch List Manager SITE-504
Pin snags on a plan, A/B/C categories, fixed and verified workflow, spot-the-snag game, 3D pins and a burndown to the handover date.
Method Statement & ITP Review Lab SITE-505
Review three method statements with planted errors, build an ITP with hold and witness points and simulate their programme impact.
FAT, SAT & Site Testing Lab SITE-506
Megger IR with PI and DAR, R1+R2 and Zs, RCD trip times, hydrostatic pressure test with gauge and 3D rig, and FAT/SAT witness checklists.
Method Statement Studio SITE-507
Build an MEP method statement, ITP, JSEA and inspection checklist: 31 activities, UAE, KSA, Qatar, UK, AU and NZ codes, 5x5 risk matrix, Word export.
Design Engineering Track (6 modules)
Codes & Authority Rules Navigator DES-601
Code hierarchy, authority and code navigator for 8 regions, which-code-answers-it trainer, order of precedence and a compliance checker, with a 3D code map and 4D approval route.
Symbols, Legends, SLD & P&ID Reader DES-602
40-symbol library and flashcards, layout take-off practice, a clickable SLD with path tracing and mains failure, a chilled water P&ID and an ISA tag decoder.
Cooling Load & Duct Static Pressure Lab DES-603
Room cooling load hour by hour with a 3D sun, supply air and psychrometrics, equal friction duct sizing, index run ESP and fan power, 3D ductwork.
Cable Sizing, Voltage Drop & Lighting Layout DES-604
Ib, In, derating, Iz, voltage drop, Zs and the adiabatic check, then a lumen method lighting layout with uniformity and a 3D room with daylight dimming.
Fixture Units & Drainage Slope Lab DES-605
Fixture schedule, peak water flow and pipe sizing, BS EN 12056-2 drain sizing, gradients, inverts and long section, 3D drain with a 4D flush wave.
Coordination & Calculation Sheet Compiler DES-606
Service priority and clearances, a ceiling void planner with beam checks, 3D corridor install sequence and a calculation package compiler for consultant review.
Electrical & General Engineering (32 modules)
Busbar Riser Engineering Guide E-101
Size a riser to IEC 61439-6 or AS/NZS 61439.6 with derating, voltage drop and fault level, in 2D, 3D, 4D and 5D.
Riser sizing is where cheap mistakes get expensive fast - built so support spacing and current capacity get checked before the busbar is on order.
DEWA Design Tools & UAE Regs Reference E-102
Cable and breaker selector, switchboard builder and an independent regulations reference for DEWA, SEWA, Abu Dhabi and EtihadWE.
DEWA submissions get rejected for the same recurring reasons - this exists so cable and breaker selection matches the authority's own rules the first time.
Switchgear & DB Checklist Suite E-103
Eight panel checklists, a DEWA power factor calculator, busbar and MCCB checks, with Word, Excel and PDF exports.
Panel handover is where problems surface if nobody checked earlier - eight structured checklists mean nothing gets signed off on memory.
Electrical & ELV T&C Tracker E-104
Track testing and commissioning from first energisation to handover, with witness records and a printable report.
Testing and commissioning paperwork is usually reconstructed after the fact from memory - this tracks it live, system by system, so the report writes itself.
AS/NZS 3000 Practice Notes E-105
MEN earthing, RCD requirements, protection, isolation and bathroom zones explained for Australian and New Zealand practice.
AS/NZS 3000 is dense and easy to misquote on site - built as searchable practice notes and diagrams for common wiring topics.
Copper, Cable & Busbar Cost Virtual Lab E-106
Compare cable against busbar on cost, with copper price variation, containment allowances and installed rates.
Cable vs busbar decisions get made on gut feeling more often than they should - this puts real cost data behind the choice.
Switchgear Reference & Variation Tracker E-107
Look up devices by brand, range and rating, and track variations against the contract scope using your own quoted prices.
Variations get disputed because nobody can prove what was quoted vs installed - a live price and variation record settles it.
Meter Lab - Testing Instrument Reference E-108
What each test instrument measures, how to use it safely and what the reading actually tells you.
Test instruments get misused when engineers only see them once a year - a simulator lets you practice the reading before it matters on site.
UAE, NZ & Australia Engineering Regulations E-109
Compare the authority requirements across the UAE, Australia and New Zealand, with a project readiness check.
Working across UAE, NZ and Australia means three different rulebooks in your head at once - this collapses them into one place.
Earthing, Bonding & Lightning Protection Portal E-111
Thirty modules, fifteen calculators and thirty-eight drawings covering earthing, bonding, IEEE 80 grids and lightning protection.
Earthing and lightning protection design spans dozens of scattered standards and calculations - this brings the IEEE 80 step/touch/grid resistance math, drawings and standards into one portal engineers can actually work through.
Standby Generators & Emergency Power E-112
Generator sizing, step loads, fuel runtime, transfer schemes and the tests that prove them.
Generators fail to start when it matters because the AMF sequence was never actually tested - this lets you rehearse it before commissioning day.
UPS & Critical Power Systems E-113
UPS topologies, battery sizing, autonomy, room ventilation and the maintenance that keeps autonomy real.
UPS sizing mistakes surface as a blackout months later - this exists so runtime and redundancy math gets checked at design time, not after.
Electrical & ELV Codes & Standards Virtual Lab E-114
Which standard governs what, across IEC, BS EN, NFPA and AS/NZS, with compliance workflows for each discipline.
Standards get half-remembered and half-applied on busy sites - a searchable register plus an actual IEC 61439 verification workflow closes that gap.
Next-Gen MEP Virtual Engineering Toolbox E-115
Calculators across electrical, HVAC, plumbing and fire fighting, with editable inputs and the working shown.
Seventy-six scattered spreadsheets across trades is how errors creep in - this consolidates them into one consistent, downloadable toolbox.
MEPVirtual Engineer Copilot E-116
Ask in plain words. It finds the right lab and tab, answers from the reference libraries and runs the calculation in 2D, 3D and 4D.
Junior engineers need a second pair of eyes that's always available - describe the load in plain language and get a transparent, checkable calculation back.
Cable Tray & Containment Virtual Lab E-117
Tray sizing, fill, spare capacity, supports and segregation, with 2D and 3D layouts.
Containment gets under-sized when it's an afterthought - automatic tray/ladder sizing against real cable inventory catches that before installation.
MEPVirtual Q&A Knowledge Hub E-119
Thousands of engineering questions and answers across design, site and commissioning, searchable by trade and stage.
3,166 questions means someone doesn't have to ask the same thing twice - a searchable knowledge bank across every discipline on this site, leveled for where you are in your career.
Solar PV & Renewable Energy Integration Lab E-120
String sizing against cold Voc and hot Vmp, inverter limits, roof loading and grid connection checks.
Solar PV is new territory for a lot of MEP engineers - this walks through string sizing, routing and field faults the way a mentor would.
Clash Detection Lab E-121
Service coordination and clash detection with clearance rules, priority logic and reroute options in 3D.
Clashes found on-site cost far more than clashes found in the model - a real spatial engine plus a BIM coordination primer for teams still building that habit.
Electrical Licensing Exam Lab E-122
Timed practice exams for DEWA, SEWA, Abu Dhabi, EtihadWE, AS/NZS 3000, NZ EWRB and CPEng readiness.
Exam guides: DEWA, Abu Dhabi, SEWA, EtihadWE (FEWA), Australia, NZ EWRB, CPEng.
Authority and registration exams are where good engineers lose months to a resit - sit a realistic timed paper, see exactly why each answer is right, and walk in knowing your weak topics.
MEP Specification Generator E-123
Build specification sections for electrical and building services, with options, standards and export to Word.
Writing a tender specification from an old project file means hours of find-and-replace and outdated standards slipping through - answer a few questions and start from a clean, current, project-neutral document instead.
CBS & Emergency Lighting Virtual Lab E-124
Central battery systems and emergency lighting: battery sizing, autonomy, circuit voltage drop and a submittal checklist.
Emergency lighting is checked once at handover and then forgotten - this lab makes the autonomy, battery and voltage-drop math visible before the submittal is approved.
Unified MEP Design Labs E-125
Six linked design labs on one page: jurisdiction rules, cooling load, cable and breaker sizing, IEEE 80 earthing and drainage.
Trades are usually sized in separate spreadsheets that never talk to each other - here the fan from the HVAC load becomes the feeder, the cable becomes the tray and the condensate becomes the drain.
LV Switchgear Verification & Assembly Lab E-126
IEC 61439 design and routine verification, FAT certificate, fault level, curve study, discrimination, temperature rise and internal arc.
LV Switchgear Design Lab E-127
Design an MDB, MCC or distribution board with live single line, front GA, 3D model, 4D assembly sequence and 5D cost.
Wiring Diagrams Interactive Lab E-128
Hundreds of interactive schematics for lighting, motor control, VFD, BMS, fire alarm, access control, boards and earthing.
MEP Design Basis & Authority Workflow Lab E-129
Load estimation, transformer and substation sizing, voltage drop, fault level and the authority approval route by region.
Harmonics & Power Quality Lab E-130
Isc/IL for single, parallel or split-bus transformers, load spectra, THDi, TDD and THDv against IEEE 519-2022 including even and interharmonics, derated active filter sizing and detuned capacitor resonance.
Facade & Architectural Lighting Lab E-131
LED run load and DC voltage drop with end, both-end and mid feed, PSU and driver sizing, inrush and drivers per MCB, DMX512 universes and address map, wall illuminance and luminance, and a 4D dusk-to-midnight show with energy, cost and CO2.
Healthcare Electrical Lab E-132
Hospital room classification (Group 0/1/2, body and cardiac-protected areas), supply branches and changeover times, medical IT and isolated power sizing, insulation fault simulator, bonding, generators and UPS, imaging feeders, a 3D operating theatre and a 4D mains failure replay.
Data Center Power Lab E-133
Build N, N+1, 2N and distributed redundant topologies, break components and test Tier III concurrent maintainability, size UPS, batteries and generators, model PUE, explore a 3D data hall and replay a utility failure with server inlet temperatures.
Load Schedule Auditor & Phase Balancer E-134
Upload Excel DB, SMDB and MDB load schedules to check phase balance, breaker vs cable sizes, RCDs and totals. Runs in your browser, nothing is uploaded.
High Voltage Academy (17 modules)
Seventeen labs for 11 kV to 132 kV networks, from utility rules and substation layout to protection, GIS and energisation. Open the HV Academy →
Regional Regulation & Utility Engine HV-501
Compare HV voltages, utilities, earthing, phase colours and standards for the UAE, Saudi Arabia, Australia, New Zealand, Singapore and Malaysia. Free lab.
Network Topology & Substation Layout Lab HV-502
Fault an 11 kV open ring and watch restoration in 4D, compare SAIDI by topology, then size a substation room with clearances, ventilation and oil bund in 3D.
HV Switchgear & Ring Main Unit Lab HV-503
Select RMU ratings to IEC 62271, size HV fuses and relays, practise switching with live interlocks and explore a 3D ring main unit. Free interactive lab.
Distribution Transformer Design & Installation Lab HV-504
Size distribution transformers, check losses, vector groups, taps and IEC 60076-7 hot-spot ageing, with 2D, 3D and 4D views and installation steps.
HV Cable Engineering Lab HV-505
Rate 11 to 33 kV cables to IEC 60287, check short-circuit withstand to IEC 60949, compare laying methods and see heat maps and a 3D cable trench. Free lab.
Fault Level & Short Circuit Lab HV-506
Calculate HV and LV fault levels to IEC 60909: peak, breaking and thermal currents, switchgear ratings, waveforms, 3D busbar forces and earth faults.
Protection & Coordination Studio HV-507
Grade HV relays, fuses and LV breakers on a live time-current chart, simulate faults in 4D, test 87T differential and REF, and print a setting sheet.
HV Substation Earthing Lab HV-508
Design an IEEE 80 earth grid, calculate GPR, touch and step voltages, see the surface potential in 3D, run a Wenner soil test and check hot zones. Free lab.
Insulation Coordination & Surge Lab HV-509
Select surge arresters, check LIWL margins and protective distance, watch lightning surges reflect in 4D and check IEC 61936 clearances. Free interactive lab.
Generation & Renewables Interconnection Lab HV-510
Synchronise a generator on a live synchroscope, check voltage rise and hosting capacity, test loss-of-mains protection and run a 3D PV and battery plant.
HV Testing & Commissioning Lab HV-511
Simulate HV tests: insulation resistance, VLF and tan delta, TDR, transformer TTR, CT knee point, CB timing and relay injection, then print test sheets.
HV Safety & Switching Operations Lab HV-512
Practise HV switching programs, calculate arc flash energy and PPE, see approach boundaries in 3D, follow permit and LOTO flows and size portable earths.
Authority Submission & Energisation Lab HV-513
Estimate maximum demand, follow the utility approval process by region, plan the critical path to energisation and rehearse energisation day. Free lab.
Asset Management & Diagnostics Lab HV-514
Interpret transformer DGA on a Duval triangle, estimate insulation ageing, grade thermography and PD results and build an asset health index. Free lab.
Primary Substations & GIS Lab HV-515
Compare busbar schemes in 4D, GIS vs AIS footprint, SF6 density and leakage, N-1 transformer capacity and a 3D GIS bay for 66 to 132 kV substations.
HV Question Bank & Case Studies HV-516
145 high voltage engineering questions with explanations, timed exams, scored failure case studies and interview and CPEng preparation. Free and interactive.
HV Installation & Site Works Lab HV-517
Calculate cable pulling tension and sidewall pressure, plan trenches and transformer lifts, follow an 11 kV joint step by step and test earth rods in 3D.
Medium Voltage Labs (17 modules)
Sixteen labs for 6.6 kV to 33 kV building and campus networks, plus a 788-question MV bank. Open the Medium Voltage Engineering Hub →
MV Systems & Network Explorer MV-501
Follow power from grid to building in 3D, compare radial, open and closed ring MV networks under fault, and see how each neutral earthing method behaves.
MV Cables & Accessories Lab MV-502
MV XLPE cable lab: 3D cable layers, IEC 60287 rating for 6.6 to 33 kV, voltage drop and short-circuit checks, sheath bonding and a 4D termination sequence.
RMU & MV Switchgear Lab MV-503
Explore an 11 kV ring main unit in 3D, operate the interlocks, play 4D switching sequences and size MV switchgear to IEC 62271-200.
Distribution Transformer Lab MV-504
Oil and cast resin transformers in 3D, animated Dyn11 vector groups, parallel operation, kVA sizing, losses, LV fault level and an IEC 60076-7 thermal day.
Substation Design & Layout 3D MV-505
Design an 11 kV building substation or kiosk in 3D: operating clearances, doors, transformer room ventilation, oil containment and fire separation.
Short Circuit & Load Flow Studio MV-506
IEC 60909 short circuit from the 11 kV source to the final DB: three-phase and earth fault levels, peak current, motor contribution and voltage profile.
MV Protection & Relay Coordination MV-507
Plot IEC IDMT relays, HV fuses and LV ACBs on one TCC chart, check grading margins, inrush and damage curves, and size CT knee-point voltage.
MV Earthing & Step/Touch Lab MV-508
Design a substation earth grid to IEEE 80: grid resistance, GPR, mesh and step voltage against tolerable limits, with a 3D surface potential view.
MV Testing & Commissioning Lab MV-509
Virtual MV commissioning tests: IR and PI, VLF withstand and tan delta to IEEE 400.2, transformer ratio and winding resistance, relay secondary injection.
Switching, Safety & Permits Simulator MV-510
Build an 11 kV switching program, then run it on a live ring. The simulator catches unsafe earthing, missed prove-dead steps and early permits.
Utility Approvals & Interface Workflow MV-511
Plan a new 11 kV utility connection from load application to energisation: documents per stage, a Gantt with critical path and delay scenarios.
Power Quality & Reactive Compensation MV-512
Build waveforms from harmonics and see THD and K-factor live, size a PF correction bank, check resonance and compare 7% and 14% detuned banks.
Renewables, BESS & EV MV Integration MV-513
Simulate a day of PV, battery storage and EV charging behind an 11 kV connection: peak demand, reverse power, transformer loading and voltage rise.
Digital Substation, SCADA & IEC 61850 MV-514
Watch an IEC 61850 substation work: sampled values, GOOSE trips, breaker operation and SCADA on a millisecond timeline, with PRP, HSR and bandwidth.
Condition Monitoring & Failure Forensics MV-515
Read DGA on an interactive Duval Triangle, classify thermography hot spots, read partial discharge trends and PRPD patterns, and solve MV failure cases.
4D Substation Project Simulator MV-516
Capstone MV project: estimate load, size transformer, RMU and 11 kV cable, lay out the room, then get a BOQ, cost estimate and a 4D programme.
MV Question Bank & Practice Exams MV-517
788 medium voltage (11, 22 and 33 kV) multiple choice questions with answers and explanations. Practise by module, level and region or sit a timed exam.
ELV & BMS Modules (10 modules)
Home Automation Virtual Control Lab ELV-301
KNX, DALI and home automation protocols, control strategies and the commissioning that proves them.
Home automation gets specified without anyone testing the actual control logic - this lets you drive a virtual system before committing to hardware.
BMS Field Reference ELV-302
BMS architecture, controllers, field devices, point schedules and practical commissioning reference.
BMS points lists and sequences are usually buried in someone else's spreadsheet - a field reference that's actually built for the person on site.
CCTV, Access Control & Security ELV-303
Security system architecture, access control, intrusion detection and the interfaces to fire and BMS.
Security system design keeps getting treated as an afterthought to electrical - this gives CCTV and access control the same rigor.
Structured Cabling & Data Networks ELV-304
Copper and fibre cabling, network design, containment, testing and certification.
Structured cabling failures show up as intermittent network faults months later - get the topology and standards right at design stage instead.
CCTV Video Surveillance System Lab ELV-305
Camera selection, pixel density and DORI, storage and bandwidth, SIRA requirements and handover records.
Camera coverage gets specified by eye far too often - a proper video surveillance system lab makes the coverage math visible.
Public Address & Voice Alarm (PAVA) ELV-306
PAVA design, zoning, speaker selection, intelligibility and the standards behind each requirement.
PAVA systems are life-safety and easy to under-spec - built so zoning and intelligibility get checked, not assumed.
Wi-Fi Heat Map Studio ELV-310
Import a floor plan, place access points, draw wall losses and study coverage, interference and PoE budgets.
Access Control System Master Lab ELV-307
Learn access control design: OSDP vs Wiegand, door hardware, maglock voltage drop, PSU and battery sizing, anti-passback, lifts, fire release and SIRA rules.
Gate Barrier & Parking Management Masterclass ELV-308
Boom barriers, bollards, road blockers, gates, induction loops, ANPR, parking guidance and fire alarm interface, with ELV sizing calculators.
TV & Media Systems Lab ELV-309
SMATV and IPTV design lab: LNB and multiswitch logic, dish link budget, coax riser designer, spectrum faults, IPTV multicast and RF over fibre budget.
Fire Alarm Modules (1 module)
Fire Alarm System Virtual Lab FA-201
Detection design, loop and addressing, battery calculations and a cause and effect simulator.
Fire alarm cause-and-effect logic is exactly the kind of thing you don't want to discover is wrong during a real event - simulate it first.
HVAC & Mechanical Modules (4 modules)
HVAC Virtual Engineering & Diagnostics Lab HVAC-401
Thermodynamics, primary equipment, piping and hydraulics, air distribution, controls and commissioning in 2D, 3D and 4D.
HVAC Equipment & Diagnostics Simulator HVAC-402
FCU, AHU, chiller and VRF units with their wiring and controls, fault finding and testing and commissioning sequences.
HVAC Electrical Engineer Training Lab E-110
HVAC loads, motor starting, controls and BMS interfaces for electrical engineers working on mechanical systems.
FAHU Live Lab E-118
How a fresh air handling unit works: filters, coils, heat recovery, humidity and controls, shown as a live unit.
MECHANICAL · HVAC · PLUMBING · FIRE FIGHTING
HVAC, Mechanical & Plumbing modules
Explore how equipment works, run practical calculations and review system design and site decisions.
HVAC-401 · VIRTUAL LABHVAC Virtual Engineering & Diagnostics LabThermodynamics, primary equipment, piping and hydraulics, air distribution, controls and commissioning in 2D, 3D and 4D.Open HVAC-401 ↗HVAC-402 · SIMULATORHVAC Equipment & Diagnostics SimulatorFCU, AHU, chiller and VRF units with their wiring and controls, fault finding and commissioning sequences.Open HVAC-402 ↗E-118 · INTERACTIVE HVAC LABFAHU Live LabExplore airflow, cooling, filtration and heat recovery through an interactive fresh air handling unit.Open FAHU lab ↗
E-110 · HVAC SYSTEM TRAININGHVAC Electrical Engineer Training LabWork through HVAC equipment controls, motor starting and operating sequences.Open HVAC training ↗
E-115 · INSIDE THE MEP TOOLBOXHVAC CalculatorsExplore cooling load, duct sizing, ventilation and related calculations in the HVAC tab.Open HVAC calculators ↗
E-115 · INSIDE THE MEP TOOLBOXPlumbing & DrainageExplore pipe sizing, drainage and water system calculations in the Plumbing & Drainage tab.Open plumbing calculators ↗
E-115 · INSIDE THE MEP TOOLBOXFire Fighting CalculatorsExplore fire protection calculations in the Fire Fighting tab of the toolbox.Open fire fighting tools ↗
E-119 · QUESTION BANKHVAC, Plumbing & Fire Q&ASearch questions by trade and project stage in the MEP knowledge hub.Open knowledge hub ↗