200 amp service change

Merry Christmas
J

Jimmy7

Senior Member
Location
Boston, MA
Occupation
Electrician
I have a customer who wants to change their above ground 200 amp service in their single family home. The dryer and the range are both currently three wire. The panel is located in a finished basement that has sheetrock ceilings. The dryer and range are located on the first floor, so trying change them to four wires would be difficult. Is there a way in which I can keep these appliances three wire, change the service, and satisfy articles like 230.85?
I’m in MA and we’re currently in the 2023 code.
 
If the 2023 code applies, and the circuits in question originate in the service equipment, the provisions of 250.140(B) many permit the existing 3 wire branch circuits to remain.

If the new outside disconnect is marked "EMERGENCY DISCONNECT, NOT SERVICE EQUIPMENT" you can have the service equipment inside and use the provisions of 250.140(B), assuming that the new service equipment is in the same location as the previous service equipment. If the dryer and range circuits would have to be extended of if they are supplied by a sub-panel, you can't use 250.140(B).
 
Little Bill said:
I would have thought that NJ rehab code would have allowed the 3-wire to stay. Here, if we aren't opening walls, ceilings, etc. we can keep the existing. Changing the service would have no effect on branch circuit wiring.
Click to expand...
He said he's in Massachusetts. :giggle:

As Don stated if the new panel is the still the service then nothing has to change even with the EM disconnect on the outside.
 
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