Only have power to half my breaker box.

[GPintheMitten]

For the minimal extra cost, why not run all four wires (hot, hot, neutral, ground) to any 240 volt termination? It will be there if needed in the future and likely a PITA to add later.

Sure if it is new work.

 

[PILOON]

Bit scary to give bad advice as well, especially when you don't know what you are talking about. White wires are permitted for some 240 volt applications.

The usual method when using a non standard color coding is to wrap as much of the wire with colored tape to indicate the color change.
For that matter you often find heat shrink sold in handy packs that contain white, black and red just for that purpose.
That way there is no confusion for any person that might trouble shoot your installation.

 

[duke7595]

The usual method when using a non standard color coding is to wrap as much of the wire with colored tape to indicate the color change.
For that matter you often find heat shrink sold in handy packs that contain white, black and red just for that purpose.
That way there is no confusion for any person that might trouble shoot your installation.

Thank you for your input, the wires in question have all been colored black.

 

[Mace Canute]

My dryer is from the late 1990's, three wires on the terminal block, red, white, and black (hot,neutral,hot). The dryer is grounded to the neutral conductor at the terminal block. A green/yellow stripped wire connects the terminal block and the dryer chassis. 120 powers the control system and spins the drum, 240 powers the heating element.

Q

I believe NEC discontinued allowing that in the 1996 edition.

 

[grsthegreat]

glad you got it resolved. Im an electrical contractor and Op is correct...a white wire IS permitted for things like 240 volt heaters and 240 volt water heaters. They HAVE to be marked with black marker on both ends for 6" of the final length. Those people saying you cant power a white wire dont know what there talking about.

 

[grsthegreat]

I believe NEC discontinued allowing that in the 1996 edition.

you have to use 4 wire in new construction, but you dont have to change over any existing 3 wire systems....... there not enforcing the swap out if you replace an existing 3 wire outlet with a new 3 wire outlet. but you CANT install a 4 wire receptacle with out running a true 4 wire circuit.

 

[duke7595]

glad you got it resolved. Im an electrical contractor and Op is correct...a white wire IS permitted for things like 240 volt heaters and 240 volt water heaters. They HAVE to be marked with black marker on both ends for 6" of the final length. Those people saying you cant power a white wire dont know what there talking about.

Thank you for the good information I believe i have everything wired correctly and all is well.