WARNING: Extension Cords

Discussion in 'Prime Plug-in Charging' started by Rob43, Oct 15, 2019.

  1. jerrymildred

    jerrymildred Senior Member

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    It's a Duosaida. I've been using it for at least three years.
     
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  2. Old Bear

    Old Bear Senior Member

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    I just came across this YouTube video and thought that a number of people in this forum would find it of interest:



    The video is somewhat long, but it does a good job of explaining many of the issues with extension cords and why their wire-size is so important.

    One take-away is that because the Prime's OEM charging cable (EVSE) is designed to run on a 15-amp household circuit, if you're using an extension cord rated at 15-amps you're reasonably protected by the 15-amp circuit-breaker when you plug into a 15-amp circuit. But if you plug into a 20-amp circuit, and there is a fault in the charging unit or elsewhere along the length of the cord, don't expect the 20-amp circuit breaker to protect the extension cord from overheating, melting, or igniting something.

    Also noted in the video is that 20-amp circuits should have outlets with T-slots but that is not always the case. So you can never be sure whether an ordinary-looking 120-volt outlet is protected by a 15-amp circuit breaker or a 20-amp circuit breaker.
     
  3. ChapmanF

    ChapmanF Senior Member

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    Well, you can, once you know what breaker it's on; then you just look. I've usually made it a point right when moving into a place to figure out what circuits all the outlets are on: it's easy to spot them all before furniture is in place, and there might even be some helpers around to watch in different rooms while the breakers are tried.
     
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