Well my DIY cord is 12G and my line (12G) is on a 20A breaker and my wall sockets are also 20A so I am covered everywhere other than the 15A termination on the plug end of my DIY cord if I want to follow the UL guidelines/rules.
I guess the "right" and safest way to alter my cord is to acquire 20A terminations for both ends...
I guess the "right" and safest way to alter my cord is to acquire 20A terminations for both ends...