30 Amp Disconnect Wiring
By Dave Rongey
Summary: Electrical Wiring Question:
I'm putting in a 30amp disconnect with 10/3 AWG with a ground wiring. The disconnect is a signal phase with ground no neutral bar.
Electrical Wiring for a 240volt 30amp Disconnect Switch
Does a 240volt circuit require a neutral wire?
Is a Neutral Wire of a 240volt Circuit Needed?
Key Factor: What is this disconnect being used for, or what equipment is being fed from the disconnect switch?
In older home applications, if the neutral wire is a spare, and the 240volt equipment does not require the neutral, then you could simply cap off the existing neutral wire.
New Homes and Electrical Upgrade Projects:
In New Construction Projects where 240volt equipment will be installed a neutral wire may be required. Please consult the electrical code updates and equipment specifications for specific circuit requirements.
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