Temp Service

[Hendrix]

Can a temp be less than 100a.?

 

[Dennis Alwon]

I hope so since the temp boxes we use are rated 70 amps or so. I have done some 200 amp temps but most are the manufacturer box with 2 120V recep & cir. and 1 - 240V recep

 

[jumper]

I hope so also, 10/3 UF and four 20A, or 1 30A and 2 20A, circuits is common in my experience. GFCI protected of course.

 

[infinity]

IMO you need to comply with this part of Article 230 even for a temporary service.

230.79 Rating of Service Disconnecting Means.
The service disconnecting means shall have a rating not less than the calculated load to be carried, determined in accordance with Part III, IV, or V of Article 220, as applicable. In no case shall the rating be lower than specified in 230.79(A), (B), (C), or (D).
(A) One-Circuit Installations. For installations to supply only limited loads of a single branch circuit, the service disconnecting means shall have a rating of not less than 15 amperes.
(B) Two-Circuit Installations. For installations consisting of not more than two 2-wire branch circuits, the service disconnecting means shall have a rating of not less than 30 amperes.
(C) One-Family Dwellings. For a one-family dwelling, the service disconnecting means shall have a rating of not less than 100 amperes, 3-wire.
(D) All Others. For all other installations, the service disconnecting means shall have a rating of not less than 60 amperes.

 

[Dennis Alwon]

IMO you need to comply with this part of Article 230 even for a temporary service.

And (D) is 60 amps and that is the disconnect rating.

 

[jumper]

IMO you need to comply with this part of Article 230 even for a temporary service.

Why would I have to comply with 230 for a 590 install?

590.4 General.
(A) Services. Services shall be installed in conformance
with Parts I through VIII of Article 230, as applicable.

What is applicable for a temp service?

 

[Dennis Alwon]

And (D) is 60 amps and that is the disconnect rating.

However art. 230.42(B) IMO, means that the service conductors must be sized for the disconnect determined in 230.79

 

[infinity]

Why would I have to comply with 230 for a 590 install?

590.4 General.
(A) Services. Services shall be installed in conformance
with Parts I through VIII of Article 230, as applicable.

What is applicable for a temp service?

Unless I missed sometihng, the section I posted is in part VI which is between parts I through VIII.

 

[jumper]

However art. 230.42(B) IMO, means that the service conductors must be sized for the disconnect determined in 230.79

Yep, the temp service need only be sized to the load. Until the building is built and classified it is just a basic structure. It could be one 15A circuit.

 

[jumper]

Unless I missed sometihng, the section I posted is in part VI which is between parts I through VIII.

Define a SFD please.

 

[infinity]

Define a SFD please.

That should come from the building code not the NEC.

How is that applicable to the OP anyway?

 

[jumper]

That should come from the building code not the NEC.

How is that applicable to the OP anyway?

I am thinking I misconstrued/misread your OP on this topic: Is a 100 amp service temp required for a load that is less? SFD or otherwise?

 

[infinity]

I am thinking I misconstrued/misread your OP on this topic: Is a 100 amp service temp required for a load that is less? SFD or otherwise?

I don't think so if you can meet one of the other conditions in 230.79.

The OP was somewhat vague. I just assumed that he wanted to know what the minimum size temp service he could install.

 

[rblaney]

Of Course