I have a work shop currently powered with a 20 amp breaker coming from my main panel. I want to dedicate that to a small hot water heater, and run more power for other appliances. I was thinking of running more power from my house's subpanel. I’d like to also power a small heat/ac window unit, microwave, plus some receptacles and lights. Would one more 20 amp circuit be enough, or should I run two 20 amp circuits?
power a small heat/ac window unit [ How much current will that use ? I am thinking at least 20 AMPS ]
A microwave - fixed (like over range or in wall) it must have a dedicated circuit - moveable countertop models 20 Amp
Receptacles 20 Amp
- lights 15 AMP
Will one more 20 amp be enough ? No - you will need at least 3 more depending .
- Do you have a sub panel that feeds your shop or in the shop ?
- Do you only have a 20 Amp run from the main to the shop sub panel ?
- What CB Amperage is in the main panel feeding the shop sub panel ?
If you have 20Amp CB in your main panel feeding the Sub panel in your shop - you will need to upgrade the sub panel feed CB upgraded, Wiring from Main to Sub panel upgraded, Sub Panel might also need to be upgraded.