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This page is open from a file, so the site map, 3D view and search cannot load. Upload the folder to Netlify and open mepvirtual.com/e-116_mepvirtual_engineer_copilot, or run it from a local web server.

Ask MEPVirtual.Find it, solve it, see it.

Type what you are working on. The Copilot searches every lab, tab and guide on this site, answers from our reference and Q&A libraries, and runs the calculation with a 2D schematic, a 3D model and a 4D time view.

Every block is a lab. Drag to turn the building, select a block to open it.

Conversation

Answers come from MEPVirtual pages, the Q&A hub and the calculators on this page. Verify against current authority rules and manufacturer data before sign-off.

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About this lab: MEP Engineers Copilot

MEP Engineers Copilot

The Copilot is the front door to MEPVirtual. Ask a question in plain words and it finds the right lab, opens the matching tab, answers from more than three thousand engineering questions written for this site, and runs the calculation with live inputs.

Diagnose a site fault

Describe a site problem in plain words and the Copilot matches it against a library of 363 MEP, HVAC, ELV, fire, plumbing and coordination fault cases, each written as problem, effect, root cause, corrective measures and verification. You can then hand the question plus the matched cases to a free AI account of your choice.

What it can calculate

  • Cable and breaker selection with derating, voltage drop, motor starting, earth conductor and fault withstand
  • Standby generator size, step load and fuel runtime
  • UPS battery capacity, central battery emergency lighting and fire alarm panel batteries
  • CCTV recording storage and disk count
  • Earth rod resistance and rod count to a target
  • Solar PV string length against inverter limits
  • Cable tray width and fill

How to read the views

The 2D view is an animated single line. The 3D view is a model of the installation you described. The 4D view adds time: conductor temperature through a working day, a fuel tank emptying, a battery discharging, or storage filling until it overwrites.

Practical engineering example

A 75 kW AHU motor at 400 V with power factor 0.85 and efficiency 0.93 draws about 137 A. On a perforated tray at 45 °C the derating factor is 0.87, so a 50 mm² copper XLPE cable on a 160 A breaker carries the load, with about 1.6 % voltage drop over 60 m.

Developed by Eng. Mannan Maqsood. Verify design outputs against current project requirements and the applicable authority and manufacturer data.

© 2026 Eng. Mannan Maqsood | Engineering Excellence Through Interactive Labs

VERIFY ALL FIGURES AGAINST CURRENT MANUFACTURER DATASHEETS AND LOCAL AUTHORITY REQUIREMENTS BEFORE DESIGN SIGN-OFF.