Temporary Power Plan Guide

Temporary power plans show how a construction site will be powered before the permanent electrical system is available. They may include utility service, generators, temporary panels, distribution boards, receptacle locations, lighting, cords, feeder routes, and shutdown sequencing.

OSHA requires construction-site ground-fault protection for many temporary receptacles, either through GFCI protection or an assured equipment grounding conductor program. The plan reviewer should confirm that the drawings and specifications identify the protection strategy clearly before the site is energized.

What to Check First

Start with the source. Identify whether power comes from a temporary utility service, a generator, or an early connection to permanent gear. Then follow the distribution path from source to panels, branch circuits, lighting, hoists, trailers, pumps, and temporary equipment.

• Temporary service size and location.
• Generator location, fuel access, exhaust clearance, and noise constraints.
• Panel, transformer, and disconnect locations.
• Feeder routes protected from traffic, water, and demolition.
• Temporary lighting coverage for stairs, corridors, work areas, and egress.
• GFCI or assured grounding program requirements.

Coordination Risks

Temporary power is not only an electrical issue. The plan has to coordinate with logistics, phasing, safety, demolition, weather protection, and permanent equipment startup. If temporary feeders cross haul roads or if panels are installed in areas scheduled for demolition, the plan will fail quickly.

Helonic can help teams compare temporary utility assumptions with the broader drawing set, especially on phased projects where work areas change week by week.