80%

[120/240]

where in the nec does it state that a branchcircuit should only be loaded within 80% of the ocp unless its a continuous load. i looked under branchcircuits but could not find it..im in 2005 edition

 

[david luchini]

210.20(a)...(I think you mean "unless its a NONcontinuous load.")

 

[120/240]

210.20(a)...(I think you mean "unless its a NONcontinuous load.")

yes non

 

[infinity]

Also take a look at 210.23.

 

[roger]

Also look at 210.19(A)(1)

Roger

 

[120/240]

Also take a look at 210.23.

im looking for the code refernce witch says not to load a branchcircuit withen 80 %of the ocp

 

[jumper]

Post 5#

210.19 Conductors ? Minimum Ampacity and Size.
(A) Branch Circuits Not More Than 600 Volts.
(1) General. Branch-circuit conductors shall have an ampacity
not less than the maximum load to be served. Where
a branch circuit supplies continuous loads or any combination
of continuous and noncontinuous loads, the minimum
branch-circuit conductor size, before the application of any
adjustment or correction factors, shall have an allowable ampacity
not less than the noncontinuous load plus 125 percent
of the continuous load

 

[xformer]

im looking for the code refernce witch says not to load a branchcircuit withen 80 %of the ocp

I do not think you will find that. It is permissible to load a 20 amp breaker up to 20 amps. The real key is the type of load. Is it continuous or noncontinuous?

 

[roger]

im looking for the code refernce witch says not to load a branchcircuit withen 80 %of the ocp

There is no such wording in the NEC.

FYI, 125% is the inverse of 80%

Roger

 

[Little Bill]

where in the nec does it state that a branchcircuit should only be loaded within 80% of the ocp unless its a continuous load. i looked under branchcircuits but could not find it..im in 2005 edition

I think you may be talking about Table 210.21(B)(2) in the 2005 NEC

There is no such wording in the NEC.

FYI, 125% is the inverse of 80%

Roger

I don't have my 08 book handy so I don't know if its different than the 05, but I believe the table mentioned above is what the OP is talking about. That does list the 80% or 125% whichever you prefer. I also agree, this is not branch circuit load, but that may be what is he thinking.

 

[roger]

I don't have my 08 book handy so I don't know if its different than the 05, but I believe the table mentioned above is what the OP is talking about. That does list the 80% or 125% whichever you prefer. I also agree, this is not branch circuit load, but that may be what is he thinking.

No, the table only tells you the maximum cord-and-plug-connected load to a receptacle and in this case it is saying 80%, it is not sizing anything at 125% and you are correct that is not refering to the branch circuit or OCP.

Roger

 

[david luchini]

im looking for the code refernce witch says not to load a branchcircuit withen 80 %of the ocp

See post #2...And then read 210.20(A).