Awareness only — does not authorise you to perform this work or replace employer-specific practical training and competent-person assessment.
Control Systems
Electrical Safety & Lockout/Tagout (LOTO)
Electrical hazards, isolation and Lockout/Tagout (LOTO) discipline for UAE construction sites — DEWA/ADDC/SEWA requirements, temporary supplies, RCDs, permits and prove-dead procedure.
v2.0Updated 15 Feb 2026ADOSH-SF v4.1 (February 2026)Learning Objectives
- Recognise electrical hazards on temporary construction supplies.
- Apply the 6-step LOTO procedure to isolate energy sources.
- Use the correct test-before-touch and prove-dead sequence.
- Understand RCD, IP-rating and cable management requirements.
- Comply with UAE authority requirements for site electrical works.
Awareness Video
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1. Electrical Hazards on Site
Shock, arc-flash, burns, secondary falls, and fires from damaged cables, unearthed distribution, wet conditions, and unqualified persons. Construction supplies are among the highest-risk electrical environments — heat, dust, water and mechanical damage combine.
2. Temporary Supplies, RCDs & IP Ratings
All 220-V outlets on 30 mA RCD protection. Distribution boards IP54 minimum, weather-protected. Armoured or braided flexible cable — not domestic PVC. Cables raised on stands or protected in duct crossings. Daily visual inspection before energising.
3. The 6-Step LOTO Procedure
(1) Prepare — identify all energy sources. (2) Notify affected workers. (3) Isolate at the source (breaker, valve, disconnect). (4) Lock and tag each isolation with a personal padlock and tag. (5) Verify — test-before-touch on the equipment. (6) Return to service — reverse order, only the person who locked it out may remove their lock.
4. Test-Before-Touch / Prove-Dead
Voltage tester proven on a known live source → test the isolated conductors → re-prove on the known live source. If any of the three steps fails, the isolation is not verified. Never remove barriers or open panels without prove-dead completed.
5. Qualified Persons & Permits
Only DEWA/ADDC/SEWA-authorised electricians work on live or previously live systems. Electrical Permit-to-Work required for HV/LV panel works, cable pulling near live services, and permit-to-live for energising new circuits. Non-electrical workers stay outside the exclusion zone.
6. UAE Requirements
DEWA/ADDC/SEWA Regulations for Electrical Installations, ADOSH-SF CoP on electrical safety, and DM/Trakhees temporary installation guidance. Non-compliance results in supply disconnection and municipality penalties, in addition to injury risk.
Knowledge Assessment
1. All 220-V site outlets must be on:
2. Site distribution boards should be at minimum:
3. The correct LOTO procedure has:
4. Who removes a personal LOTO lock?
5. Test-before-touch requires:
6. Domestic PVC flex on site is:
7. Work on live LV/HV panels requires:
8. Cables crossing roads should be:
9. A permit-to-live is for:
10. The UAE regulator for electrical installations in Abu Dhabi is:
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