I recently purchased a 1940 and 1953 edition of the NEC.
The 1940 edition permitted a range and dryer to be grounded by the neutral. This method was permitted but not mandatory. A separate equipment ground conductor could be installed, but also not mandatory.
I stated, on other boards, that world war 2 was not the reason for the 3 wire connections. The war did make it mandatory for what was already permitted.
There was a moratorium on appliances and home building during the war, so the mandatory ruling was not necessary to conserve copper.
I was accused by a world renowned code expert of posting incorrect information.
The 1940 edition permitted a range and dryer to be grounded by the neutral. This method was permitted but not mandatory. A separate equipment ground conductor could be installed, but also not mandatory.
I stated, on other boards, that world war 2 was not the reason for the 3 wire connections. The war did make it mandatory for what was already permitted.
There was a moratorium on appliances and home building during the war, so the mandatory ruling was not necessary to conserve copper.
I was accused by a world renowned code expert of posting incorrect information.