Ev chargers code violation

[hhsting]

Attached sketch shows 480/277V three phase switchboard with 1600A main breaker. The switchboard feeder breaker 300A feed 150kW power cabinet. The power cabinet convert ac to dc then feed 150kw dispenser 400V dc to 927dc.

The switchboard breakers when I look at submittal is 4 poles. Neutral also has breaker

Anyone who has done this sort of work is this usual? Is 4 pole breaker code violation or is their any exceptions?

 

[Hv&Lv]

You sure it’s not just a quad breaker for that 150kW load?

 

[hhsting]

You sure it’s not just a quad breaker for that 150kW load?

quad breaker? Whats that? See attached you have 480V 4 wire with 4 pole breaker

Would not 4 pole be not allowed NEC 2017?

In following manual:

 

[wwhitney]

See 240.22.

Cheers, Wayne

 

[jim dungar]

Would not 4 pole be not allowed NEC 2017?

The NEC allows switched neutrals.
Many 4 pole breakers do not sense the neutral current, although it is allowed.

 

[K8MHZ]

Am I not reading the print correctly? The drawing specifies MCCB 3P, but the spec shows MCCB 4P.

 

[petersonra]

I have a feeling this is something done in Europe by someone who does not understand US electrical systems.

 

[augie47]

I have a feeling this is something done in Europe by someone who does not understand US electrical systems.

I looked at the manufacturer's site but found little info on "listing" other than C-E which may help explain things.

 

[jap]

Am I not reading the print correctly? The drawing specifies MCCB 3P, but the spec shows MCCB 4P.

I agree it's a confusing line diagram.

Only 3 of the 4 poles shown on the MCCB are drawn as a common trip ,and,the overcurrent protection devices to Ev Quick chargers 1 and 2
are not drawn as common trip at all in my world.

JAP>

 

[WA_Sparky]

Not sure why i had such a hard time tracking down spec sheets but i did find this printed from a Jan 2021 version.