What is this feeder tap

Status
Not open for further replies.
C

codequestion

Banned
Location
MD, USA
I have service switchboard that has main breaker. The switchboard's main breaker load side feeder breaker has feeder cables feeding trough with bus in same room. The bus then has two taps. Both to two disconnect which feeds two different tenant space out of the room


I know feeder cables from swbd fdr bkr to trough are feeders. Would taps in trough be called the feeder taps? If not then what its called?

Sent from my SM-G935U using Tapatalk
 
Last edited:
If these are on the line side of the service disconnect(s) they are service entrance conductors not taps.
 
codequestion said:
I have service switchboard that has main breaker. The switchboard's main breaker load side feeder breaker has feeder cables feeding trough with bus in same room. The bus then has two taps. Both to two disconnect which feeds two different tenant space out of the room


I know feeder cables from swbd fdr bkr to trough are feeders. Would taps in trough be called the feeder taps? If not then what its called?

Sent from my SM-G935U using Tapatalk
Click to expand...

Unless the cables feeding the bus in the trough are big enough to be protected by the main breaker, I would call this a code violation.
 
petersonra said:
Unless the cables feeding the bus in the trough are big enough to be protected by the main breaker, I would call this a code violation.
Click to expand...
No no they are. Feeder cables and the bus are big enough to be protected by the switchboard feeder breaker.

Sent from my SM-G935U using Tapatalk
 
codequestion said:
I have service switchboard that has main breaker. The switchboard's main breaker load side feeder breaker has feeder cables feeding trough with bus in same room. The bus then has two taps. Both to two disconnect which feeds two different tenant space out of the room


I know feeder cables from swbd fdr bkr to trough are feeders. Would taps in trough be called the feeder taps? If not then what its called?

Sent from my SM-G935U using Tapatalk
Click to expand...

Yes, they would be feeder taps
 
Details are sketchy, but sounded like there were taps coming off the feeder bus. Not sure what the bussed thing is, if it's one of those "bussed gutters" or a busway, but either way sounds like it's being used as a feeder.
 
codequestion said:
But the feeder cables terminate at the bus still call the two taps for tenant space disconnects feeder taps?

Sent from my SM-G935U using Tapatalk
Click to expand...
The bus itself is a feeder, presuming it has current carrying capacity no less then the overcurrent device protecting it.

Any conductors that attach to it are just extensions of the feeder if they have an ampacity equal or greater then the overcurrent protection ahead of them. If they have ampacity less then the overcurrent protection ahead of them then they are feeder taps.
 
kwired said:
The bus itself is a feeder, presuming it has current carrying capacity no less then the overcurrent device protecting it.

Any conductors that attach to it are just extensions of the feeder if they have an ampacity equal or greater then the overcurrent protection ahead of them. If they have ampacity less then the overcurrent protection ahead of them then they are feeder taps.
Click to expand...
Switchboard feeder breaker load side feeder cables to trough bus are 2 sets of 4-600 kcmil 2/0G protected by 2500 amps bolted pressure switch upstream.

The conductors to one of the tenants disconnect from the trough bus is 4-600 kcmil, 3/0G.

The conductors to second tenant disconnect from the trough bus is 4-600 kcmil, 3/0G.

Sent from my SM-G935U using Tapatalk
 
codequestion said:
Switchboard feeder breaker load side feeder cables to trough bus are 2 sets of 4-600 kcmil 2/0G protected by 2500 amps bolted pressure switch upstream.

The conductors to one of the tenants disconnect from the trough bus is 4-600 kcmil, 3/0G.

The conductors to second tenant disconnect from the trough bus is 4-600 kcmil, 3/0G.

Sent from my SM-G935U using Tapatalk
Click to expand...

That should have been the description from the beginning.

If the 2500 amp FEEDER terminates on a buss, then the (2) Disconnects that are tapped off of it are Feeder Taps.

JAP>
 
Although the cable size for the 2500 amp feeder seem to be lacking some what.

JAP>
 
Slight edit to feeder cable size for those who pay attention since protected by 2500 amps bolted switch:

Switchboard feeder breaker load side feeder cables to trough bus are 7 sets of 4-500 kcmil 350kcmil G protected by 2500 amps bolted pressure switch upstream.





Sent from my SM-G935U using Tapatalk
 
codequestion said:
Slight edit to feeder cable size for those who pay attention since protected by 2500 amps bolted switch:

Switchboard feeder breaker load side feeder cables to trough bus are 7 sets of 4-500 kcmil 350kcmil G protected by 2500 amps bolted pressure switch upstream.
Click to expand...

How about doing us all a favor by including all of the pertinent information in the OP. :slaphead:
 
codequestion said:
Can i get more than 15 minutes?☺
Sent from my SM-G935U using Tapatalk
Click to expand...
No, you've been told about doing this before. When you start a thread include the pertinent information from the start.

Start a new thread with all the info.

Roger
 
Status
Not open for further replies.
Top