Shed Plans Shed Electrical and Lighting 2

Question 1

What breaker size is appropriate for a 20-amp general-purpose outlet circuit in a shed?

Accepted Answer

20-amp breaker

Answer

A 20-amp circuit requires a 20-amp breaker and must use 12 AWG wire; a 15-amp breaker would be undersized and trip frequently under workshop loads.

Question 2

Why is a separate sub-panel required in a detached shed rather than just running circuits from the house panel?

Accepted Answer

A sub-panel provides local disconnecting means, allows circuit expansion, and reduces voltage drop over long runs

Answer

A sub-panel in the shed provides a local disconnect, reduces voltage drop on long feeder runs, and allows multiple circuits without routing each one all the way back to the house.

Question 3

Which wire gauge is required for a 20-amp, 120V circuit in a shed?

Accepted Answer

12 AWG

Answer

12 AWG copper wire is required for 20-amp circuits; 14 AWG is only rated for 15-amp circuits and would be a code violation on a 20-amp breaker.

Question 4

What is the maximum number of outlets allowed on a 20-amp, 120V circuit in a workshop shed?

Accepted Answer

13 outlets (per NEC 180VA per device rule)

Answer

The NEC calculates 180VA per receptacle, and at 120V a 20-amp circuit provides 2,400VA, allowing approximately 13 receptacles, though practical workshop design uses fewer to avoid overloads.

Question 5

What type of lighting is most energy-efficient for a shed workshop?

Accepted Answer

LED shop lights

Answer

LED shop lights consume 50–70% less energy than fluorescent or incandescent equivalents and produce more lumens per watt with no warm-up time in cold weather.

Shed Plans Practice Test

Shed Plans Practice Test

Shed Plans Shed Electrical and Lighting 2