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Tool Talk Discussion Forum

Service

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bigrunt

04-20-2006 21:18:16




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How can i tell what size service i have to a certain box? Is it merely the breaker or the size of the wire that dictates this?




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Kevin Bismark

04-21-2006 16:43:11




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 Re: Service in reply to bigrunt, 04-20-2006 21:18:16  
Well, if you are talking about an electrical service, that will be determined by the size of the main breaker or fuse and the size of the wire coming into the panel down from the service drop and through the meter, if this is a house the smallest for a 100 amp would be number 4 copper , 200 amp 2/0 copper or 4/0 alum. may have not been done right the first time so there are things to check first, here we have to put in a by pass meter socket if we upgrade the service, there are a few thing there you have to check, grounding and such, bonding to water pipes, if it's very old you would be better off just changing it all out..

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NTP

04-21-2006 06:34:23




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 Re: Service in reply to bigrunt, 04-20-2006 21:18:16  
To answer your question, the size of the wires going to your box will determine what size of service you can put in. In many cases of new constuction in the 70"s and 80"s, the electric co would run heavier wire to the house even if people only had 100 amp service installed. Call your electric company, as they have records on this, or they will send a man out to check the box that is feeding to your house. What ever you do, check with the electric co. before putting in a larger service.

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Slowpoke

04-21-2006 00:16:13




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 Re: Service in reply to bigrunt, 04-20-2006 21:18:16  
Are you referring to an outlet like for a washer and dryer or the service entrance that receives power from the utility company? If it's a 220v dryer then it has a dedicated line and its own breaker. For a washer, there may be other outlets on the same line and all will use the same breaker, either 15 or 20 amps. The service entrance is protected by one large breaker, maybe 100 or 200 amps.



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JoeK

04-20-2006 21:36:39




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 Re: Service in reply to bigrunt, 04-20-2006 21:18:16  
Usually labelled on the box...determined by main breaker capacity IF the box was legally installed according to codes.



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Dusty

04-21-2006 05:47:29




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 Re: Service in reply to JoeK, 04-20-2006 21:36:39  
Code will allow main to be smaller than rated size of box/buss. I've seen many 200 amp panels rated at 225 amps.



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