omit neutral

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Galt

Senior Member
Location
Wis.
Occupation
master electrician and refrigeration service tech.
200 amp panel in a silo room, has no 120 volt loads, is it permissible to omit the neutral?
 

mbrooke

Batteries Included
Location
United States
Occupation
Technician
Yes, if it is not a service.



Don't forget that you can size your service neutral to the size of an EGC from the same amperage in such a case.


OP- do you really want to do this? Only reason I play worse case scenario because soon or latter a 120 volt load will be added to that panel.
 

jumper

Senior Member
Don't forget that you can size your service neutral to the size of an EGC from the same amperage in such a case.


OP- do you really want to do this? Only reason I play worse case scenario because soon or latter a 120 volt load will be added to that panel.

Code reference please?

The smallest that service neutral can be is the same size as the GEC and GEC is based on 250.66.
 

Galt

Senior Member
Location
Wis.
Occupation
master electrician and refrigeration service tech.
A 30 hp motor on single phase with a vfd 2 10 hp single phase motors a couple smaller motors. Will have 2 panels in close proximity and will have a neutral in one of them
 

mbrooke

Batteries Included
Location
United States
Occupation
Technician
Code reference please?

The smallest that service neutral can be is the same size as the GEC and GEC is based on 250.66.



A GEC can be as small as a number 6 for a 4000amp service.

(A) Connections to a Rod, Pipe, or Plate Electrode(s). If the
grounding electrode conductor or bonding jumper connected
to a single or multiple rod, pipe, or plate electrode(s), or any
combination thereof, as described in 250.52(A)(5) or (A)(7),
does not extend on to other types of electrodes that require a
larger size conductor, the grounding electrode conductor shall
not be required to be larger than 6 AWG copper wire or 4 AWG
aluminum wire.

Though this would not count for a service neutral anyway.
 
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