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Temporary Service/Power Installation Certificate

A Temporary Service/Power Installation Certificate documents a temporary electrical installation — construction-site power, special-event or seasonal lighting, or emergency/storm restoration power — installed under NEC Article 590. It records the service size, GFCI protection, disconnecting means, and grounding, plus the expected removal date.

NEC Article 590 (Temporary Installations), state/local electrical codes and AHJ permit conditionsValid: 3 months (typical AHJ temporary-permit term; renewable)

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Sample Temporary Power Cert certificate

Sample Temporary Service/Power Installation Certificate certificate created with CertBox, showing the professional PDF layout with service size and voltage, gfci protection on all temporary receptacles (nec 590.6), disconnecting means

Sample Temporary Power Cert with fictional data. All personal details shown are fake.

What it covers

  • Service size and voltage
  • GFCI protection on all temporary receptacles (NEC 590.6)
  • Disconnecting means
  • Grounding/bonding
  • Expected removal date

Who needs a Temporary Power Cert?

General contractors
Event organizers
Storm-restoration crews
Building inspectors

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Frequently asked questions about Temporary Power Cert

How long can temporary power stay installed?
NEC 590.3(D) requires temporary wiring to be removed immediately once it has served its purpose. The 90-day cap in 590.3(B) applies specifically to holiday/decorative lighting — construction-site power may run for the duration of the job, subject to the AHJ's own permit terms.
Do all temporary receptacles need GFCI protection?
Yes. NEC 590.6(A) requires GFCI protection for all 125V, single-phase, 15/20/30A receptacle outlets used by personnel on a temporary installation, whether powered from utility service or an on-site generator.

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