Basically what the title says. Not sure how to check, not so good with electrical so I can't check with a multi meter. And how hard is it to install a Marinco heater cord mod?

 

Plug a power strip into an extension cord.

Plug a lamp into the powerstrip and turn it on. Then plug the block heater in and see if the bulb dims any.

Or, stand at your electric meter and watch the dial. Have someone plug in the block heater and see if it speeds up.


Also, the maricno plug is easy to install. There is a write up in the tech folder.