Taps rule

[xoxota]

CAn I have the 10foot tap rule at the end of the 25 foot tap rule?

I have a 500A overcurrent device and would like to use the 25 foot tap rule, however, the end device does not accomodate the size of conductor required by the 25 foot tap rule. I would like to know if I can reduce the size of the wire again without the use of another overcurrent device.

 

[hornetd]

Re: Taps rule

Do I understand that you want to use a conductor size that is less than the one third of the supply conductor ampacity that is anticipated by the 25" tap rule?
--
Tom

 

[don_resqcapt19]

Re: Taps rule

See the first paragraph in 240.21.
Don

 

[iwire]

Re: Taps rule

Look at this page for "Pin Terminals" you will find them under the Compression Category of the product catalog.

These come in a wide range of sizes, as an example there is one to convert a 500kcmil down to a 350kcmil.

A common use is when you have run such large conductors for voltage drop that they will not fit in the device.

You might want to talk to the AHJ to see if they think this will violate 240.21 as Don pointed out.

240.21 Location in Circuit.
Overcurrent protection shall be provided in each ungrounded circuit conductor and shall be located at the point where the conductors receive their supply except as specified in 240.21(A) through (G). No conductor supplied under the provisions of 240.21(A) through (G) shall supply another conductor under those provisions, except through an overcurrent protective device meeting the requirements of 240.4.

I think this could go either way depending on the inspector.

[ September 03, 2003, 06:11 AM: Message edited by: iwire ]