MEPVirtual engineering articleshttps://mepvirtual.com/articles/Practical MEP engineering articles by Eng. Mannan Maqsood.enLV switchgear FAT: what to check before the panel leaves the factoryhttps://mepvirtual.com/articles/lv-switchgear-fat-what-to-check-before-it-leaves-the-factory.htmlhttps://mepvirtual.com/articles/lv-switchgear-fat-what-to-check-before-it-leaves-the-factory.htmlWed, 11 Nov 2026 06:00:00 +0400Testing & commissioningA practical factory acceptance test checklist for LV switchboards and MDBs: documents, routine verification to IEC 61439, settings, interlocks and the defects that are cheap to fix in the factory.Electrical practice in the UAE vs New Zealand and Australia: what changes when you movehttps://mepvirtual.com/articles/electrical-practice-uae-vs-new-zealand-australia.htmlhttps://mepvirtual.com/articles/electrical-practice-uae-vs-new-zealand-australia.htmlMon, 09 Nov 2026 06:00:00 +0400UAE vs New ZealandEarthing systems, RCDs, approvals, certification and roles compared for engineers moving between the UAE and New Zealand or Australia, with the standards behind each.The authority comments that keep coming back on UAE electrical submittalshttps://mepvirtual.com/articles/recurring-authority-comments-on-electrical-submittals-uae.htmlhttps://mepvirtual.com/articles/recurring-authority-comments-on-electrical-submittals-uae.htmlSat, 07 Nov 2026 06:00:00 +0400Authority & submittalsWhy electrical drawings and load submissions to DEWA, ADDC, SEWA and EtihadWE get returned, and how to close the most common comments before you submit.Why electrical witness tests fail, and how to pass the first timehttps://mepvirtual.com/articles/why-electrical-witness-tests-fail.htmlhttps://mepvirtual.com/articles/why-electrical-witness-tests-fail.htmlFri, 06 Nov 2026 06:00:00 +0400Testing & commissioningThe usual reasons a consultant or authority witness test is stopped: no pre-commissioning, expired calibration, missing ITPs, wrong test method. A practical checklist for contractors and reviewers.IEC 61439 vs IEC 60439: what changed for LV switchboardshttps://mepvirtual.com/articles/iec-61439-vs-iec-60439-what-changed.htmlhttps://mepvirtual.com/articles/iec-61439-vs-iec-60439-what-changed.htmlThu, 05 Nov 2026 06:00:00 +0400Codes & standardsTTA and PTTA are gone. What IEC 61439 changed for LV switchboards: design and routine verification, who is responsible, rated diversity factor and what to ask for in a submittal.Cable sizing in 50 °C ambient: the derating mistakes that cost a cable sizehttps://mepvirtual.com/articles/cable-sizing-in-50c-ambient-derating-mistakes.htmlhttps://mepvirtual.com/articles/cable-sizing-in-50c-ambient-derating-mistakes.htmlThu, 05 Nov 2026 06:00:00 +0400Design mistakesWhy cables sized from 30 °C tables fail in Gulf plant rooms and roofs. Ambient, grouping, ground and sun derating explained with a worked example and a checklist.