80%verses100%

[travis3710]

I here alot of electricians say you can only place 80%load on the rating of breaker.If the load is non continuous then the load can be at 100% I think.Continuous being 3 hours or more.

 

[roger]

Re: 80%verses100%

Travis,

If the load is non continuous then the load can be at 100% I think

you are correct.

Roger

 

[travis3710]

Re: 80%verses100%

Thanks, Roger

 

[roger]

Re: 80%verses100%

You're welcome.

Roger

 

[templdl]

Re: 80%verses100%

If the wire is sized properly and the breaker sized to protect the wire this, with almost all certainty, is not an issue.
Look at art 210.19 (A)(1) and 210.20(A)

 

[GG]

Re: 80%verses100%

Wouldnt you have to consider 210.23(A)(1) & (2) or are you refering to a load that would not fall in the category of 210.23(A)(1) & (2)? Thanks.

 

[iwire]

Re: 80%verses100%

Originally posted by GG:
Wouldnt you have to consider 210.23(A)(1) & (2) or are you refering to a load that would not fall in the category of 210.23(A)(1) & (2)? Thanks.

210.23(A)(1) & (2) is only about the connected loads not the entire circuit.

210.23(A)(1) for example limits one cord and plug connected equipment to 80% of the branch circuit.

So on a 20 amp receptacle circuit you could plug a 16 amp heater in along with a 4 amp TV.

 

[roger]

Re: 80%verses100%

GG, the sections you reference would not change the branch circuit OCPD rules of noncontinuous verses continuous loads.


Roger

 

[infinity]

Re: 80%verses100%

210.23(A)(1) for example limits one cord and plug connected equipment to 80% of the branch circuit.

This would only apply to a multi outlet circuit. A circuit with a single receptacle can be loaded up to 100% of its maximum rating. See 210.23

 

[petersonra]

Re: 80%verses100%

Originally posted by iwire:

Originally posted by GG:
[qb]

So on a 20 amp receptacle circuit you could plug a 16 amp heater in along with a 4 amp TV.

And just how would a HO know about this rule?

Besides, TVs are continuous loads, seeing as they are on for 3 or more hours continuously. Think super bowl sunday.