240.21.B.4 Taps

[larryz12302]

In regards to the above section, if I run a #6 from the source I want to tap from (208 - 3 phase - 70 amp)to a 3 phase 20a fused disconnect, and from the load side of the 20a disconnect to my new piece of equipment, will this satisfy the requirement. Total length of the run is about 35' (20' hozizontal - 15' vertical). I plan on using EMT. Everything is protected from physical damage.
Thanks ahead of time for everyone's input.

 

[charlie]

Re: 240.21.B.4 Taps

This section doesn't apply if you use #6 from the tap (splice) to the 20A fused disconnect. If you intend to use this 25 ft tap rule, you must shorten the run to 25 ft.

 

[larryz12302]

Re: 240.21.B.4 Taps

I understood that 240.21(B)4 was for taps OVER 25' which this would fall under.

 

[jdengr]

Re: 240.21.B.4 Taps

Have you considered just using #4 AWG for the tap? Then it would not be a tap, since the #4 would be rated for 70 Amps. Just a thought.

 

[larryz12302]

Re: 240.21.B.4 Taps

Hadn't thought of it that way. It should be ok and I can still use 1" EMT. Will be a bit tight in the 20a disconnect, though.
thanks!

 

[don_resqcapt19]

Re: 240.21.B.4 Taps

If you meet all of the conditions in 240.21(B)(4) the #6 is fine.