Tapping on multiple sets of service

[Zyb]

I need to do a tap on 2 sets of 300kcmil service. I'm doing a supply side tap for the PV system. My tapping conductor is only #2. Do I need to tap on both sets or I can just tap on one conductor.

 

[ggunn]

You must tap all the conductors in parallel sets of service conductors; if you only tap only one set they are no longer parallel.

 

[brycenesbitt]

I need to do a tap on 2 sets of 300kcmil service. I'm doing a supply side tap for the PV system. My tapping conductor is only #2. Do I need to tap on both sets or I can just tap on one conductor.

Picture? What do those 300kcmil lines land on ?

 

[electrofelon]

For "conductors in parallel or "Parallel sets" yes you need to tap all conductors

For "multiple sets of service conductors" you could just tap one set.

 

[ggunn]

For "conductors in parallel or "Parallel sets" yes you need to tap all conductors

For "multiple sets of service conductors" you could just tap one set.

I.e,. if they are going to different places you can tap one set but if they are going to one place you must tap them all.

 

[LarryFine]

In other words, if you want to use multiple wires as one wire, you have to treat them as one wire.

 

[ggunn]

I think that Zyb has got the message by now.

 

[jaggedben]

I think that Zyb has got the message by now.

Well, in case he hasn't...

Of course I forgot to bookmark it, but I do recall we a had a thread several years ago where we analyzed the theory and determined that tapping one set for solar could somewhat easily lead to a situation that overloaded the tapped set of conductors. It defeats the assumptions behind overcurrent protection and the rules for taps in 705. So a good situation to not question the parallel conductor rules.

 

[ggunn]

Well, in case he hasn't...

Of course I forgot to bookmark it, but I do recall we a had a thread several years ago where we analyzed the theory and determined that tapping one set for solar could somewhat easily lead to a situation that overloaded the tapped set of conductors. It defeats the assumptions behind overcurrent protection and the rules for taps in 705. So a good situation to not question the parallel conductor rules.

I remember that conversation, and I may have started it. It would have been 6 or 7 years ago, I believe.