Non-linear loads & MWBC

[cppoly]

For fairly large non-linear appliance loads like printers, copiers, etc. is it OK to put three of these on a MWBC or should individual neutrals be used. Possibility for excessive current on a shared neutral?

 

[dkidd]

The triplen harmonics adding on the neutral used to be a concern. I haven't seen if that has gotten any better. It was especially a concern with furniture systems.

 

[electrofelon]

Honestly, I have never worried about it, ever....

 

[jap]

Honestly, I have never worried about it, ever....

Me either.


JAP>

 

[cppoly]

Thanks

 

[Dennis Alwon]

Pull a #10 neutral and you should be fine

 

[infinity]

IMO although it's theoretically possible to overload the neutral this has been blown out of proportion. As Dennis suggested if you're concerned just pull a larger neutral.

 

[jap]

And even then, You'll probably never know if it's overloaded or not.


JAP>

 

[ActionDave]

I've never run into a problem either and I've never pulled an oversized nuetral.

 

[Besoeker3]

Honestly, I have never worried about it, ever....

Not something I have had to worry about much either with our kit either. Almost all of the kit we designed and installed was three phase.
No triple-n. But one of the other divisions got caught out on a luxury hotel in the middle east. Lots of single phase controlled lighting and other non-linear loads.
Something they had to worry about. In a big expensive way.

 

[electrofelon]

Not something I have had to worry about much either with our kit either. Almost all of the kit we designed and installed was three phase.
No triple-n. But one of the other divisions got caught out on a luxury hotel in the middle east. Lots of single phase controlled lighting and other non-linear loads.
Something they had to worry about. In a big expensive way.

I remember you mentioning that case study.


Ignorant yank question: what is "kit"?

 

[GoldDigger]

Close translation would be equipment or system of equipment working together, I think.

Sent from my XT1585 using Tapatalk

 

[Besoeker3]

I remember you mentioning that case study.


Ignorant yank question: what is "kit"?

GD has it right. We tend to use it loosely for equipment not precisely specified.
You might use it to describe a system comprising unit transformer, switchgear, protection, variable speed drive, motor, gearbox and all the various peripherals that comprise the system as a whole.