[flashover]

I have 10, 4 inch PVC pipes entering the back of a 3000 amp switchgear.

I am told I do not need to punch holes and terminate in adapters with locknuts and bushings. I can just cut out the back of the gear to fit the pipes and install end bells and call it good.

This is not normally what I would do, but I can not find where it would be a violation. I briefly looked in 300.

Do I need to use male adapters dressed up?

 

[ponyboy]

I think raceways are to be mechanically continuous unless it's entering open bottomed gear. I'll look up the article

 

[Celtic]

I have 10, 4 inch PVC pipes entering the back of a 3000 amp switchgear.

I am told I do not need to punch holes and terminate in adapters with locknuts and bushings. I can just cut out the back of the gear to fit the pipes and install end bells and call it good.

What is punching out 10 - 4" holes going to accomplish?
Will connecting the pipes to them bond anything?
Prevent movement?
Protect the conductors from damage?
etc?

What is the actual purpose?

 

[ponyboy]

300.12.

10 4" seems like overkill. I do it with 8 usually

 

[BBQ]

Coming in the back we would punch and use connectors with locknuts.


And before Celtic asks me it is done to comply with the NEC.

 

[flashover]

300.12.

10 4" seems like overkill. I do it with 8 usually

Then 10 4 inch serve:
4 parallel runs of 2 to 800 amp meter stacks, and 1 parallel run of 2 for the 800 amp house panel.(s)

 

[Celtic]

Coming in the back we would punch and use connectors with locknuts.


And before Celtic asks me it is done to comply with the NEC.

...but we are talking about coming in the bottom....

Go start you own thread for side and top entry :laughing:

 

[ponyboy]

...but we are talking about coming the bottom.... Go start you own thread for side and top entry :laughing:

He said he's coming in the back I brlieve

 

[flashover]

And in case any of you are wondering where all the buss bars are....check with some Scrapyard's.

Thief's.
This gear was stripped overnight a couple months ago.

 

[Jlarson]

KO's and TA's.

 

[BBQ]

...but we are talking about coming in the bottom....

Go start you own thread for side and top entry :laughing:

Maybe you are .... :jester:

I have 10, 4 inch PVC pipes entering the back of a 3000 amp switchgear.

 

[360max]

...why was the gear not placed on a concrete pad?

 

[BBQ]

And in case any of you are wondering where all the buss bars are....check with some Scrapyard's.

Thief's.
This gear was stripped overnight a couple months ago.

Looks like a housekeeping pad would have been a good idea.

If I was the customer I would have a real problem with the bottom of my brand new gear sitting in water.

 

[ponyboy]

...why was the gear not placed on a concrete pad?

True. That floor looks wet as it is

 

[Celtic]

I I can just cut out the back of the gear to fit the pipes and install end bells and call it good.

He said he's coming in the back I brlieve

True he did....but looks like bottom in the pic:

Can you see part of the radius there or do I need new glasses?

 

[ponyboy]

And in case any of you are wondering where all the buss bars are....check with some Scrapyard's. Thief's. This gear was stripped overnight a couple months ago.

Someone went to the trouble to steal aluminum buss bars?

 

[Chris Kennedy]

Looks like a housekeeping pad would have been a good idea.

If I was the customer I would have a real problem with the bottom of my brand new gear sitting in water.

Is that water or epoxy?

 

[ponyboy]

True he did....but looks like bottom in the pic: Can you see part of the radius there or do I need new glasses?

I figured those for load side pipes. There's nothing there to feed the breaker yet by the looks of it

 

[flashover]

...why was the gear not placed on a concrete pad?

Landlord turned builder, I asked for housekeeping pads and got "we don't pay for that".

Sorry I thought it was tucked in your 10 million dollar project somewhere.

 

[flashover]

I figured those for load side pipes. There's nothing there to feed the breaker yet by the looks of it

Coming in the bottom on the left is the xfrmer secondary