If you're an MEP engineer working in the UAE, you already know: DEWA inspections can make or break your project timeline.

After years in the field, the same mistakes keep showing up. Here are the top 5:

1. Incomplete earthing systems

Especially in villas. Engineers rush the earthing layout and skip verification. DEWA catches this every time. Double-check your earth resistance readings before you even call for inspection.

2. Wrong cable sizing on submains

Pure calculation negligence. Use the correct diversity factors for your load schedule. DEWA's reference tables are non-negotiable — if your cable sizing doesn't match, you're getting rejected.

3. Poor labeling on DB panels

Sounds basic? It is. But unlabeled or mislabeled circuits in distribution boards are an instant red flag. Label everything. Include circuit descriptions, breaker ratings, and phase identification.

4. Missing or incorrect fire alarm integration

In high-rise buildings, the fire alarm system must integrate with MEP services — smoke dampers, fire pumps, pressurization fans. If your cause-and-effect matrix doesn't match your as-built drawings, you're done.

5. Non-compliant plumbing venting

Vent pipes that terminate inside the building or are undersized. DEWA follows specific standards for vent sizing and termination height above roof level.

The difference between engineers who pass inspections first-time and those who don't? Preparation and knowing the standards cold.

I put together a comprehensive guide covering all of this — MEP installation, commissioning for villas and high-rises, DEWA standards, and a career roadmap from site engineer to senior roles. If you're serious about your engineering career in the UAE, it's worth checking out.