1947

Year: 1947

Pages: 384

Size: 4" X 6"

Availability: Very Common

Facts:

This year was mass produced and can be found easily.

The one on the right has 1946 marked out. It is hard to find

First time to require grounding type (3-prong) receptacles for the laundry area only.

Allowed the use of a neutral for a equipment grounding conductor for electric ranges.

I have (1) of each these books