12/15/2023 0 Comments Siemens 100 amp breakerAlso, if not torqued properly, the connection can loosen up over time due to heat/cool cycles. If the wire connection wasn't torqued tightly enough, then the contact surface area between the wire and the lug on the plug can be smaller, leading to heat over time. Improperly torqued wire connections can cause a failure like this on any plug, whether it's in good shape and quality built or not.This is fairly well documented for some Leviton NEMA 14-50, but wouldn't be surprising to see in other plug types too. They have smaller, thinner, contacts that heat up over time. Some plugs just aren't built to handle long-duration loads.If using a plug-in type charger, it's best to plug it in and leave it plugged in. This can reduce the contact surface area and increase heat for long-running loads. Plugs wear out from use (plugging/unplugging).Probably a lot of EVSE’s with this safety feature, I just don’t spend my time reading EVSE datasheets/manuals ¯\_(ツ)_/¯Ī few things going on here, potentially. May or may not be a good purchase for the future now that everyone is switching to NACS. The only one I know in the US market with this feature is Teslas Wall Connector. With regard to dedicated wall boxes there are some that are equipped with thermal sensors on the connector and will throttle or shut down if it gets too hot. The same typically applies to sockets as well. In general you should never exceed a charge rate that is higher than 80% of the rating of the fuse, so if your fuse is 40A you should not charge beyond 32A. If you’re lucky you can just cut away the part that was closest to the socket and terminate directly. With regard to the wiring and if you need to replace it, it really depends on how much excess wiring is in place. Hard wiring is recommended, but apart from posts with your experience I typically get negative feedback from Americans whenever I convey that point - because apparently it’s more convenient to be able to use the EVSE that came with the car and take it with you than it is to avoid your house burning down just because anecdotally they didn’t have any issues with it. I will grant that plugs introduce more connections which introduce more potential points of failure, compared to hard wiring. It's interested to note that clearly one prong was the source of the issue, suggesting that the poor connection involved that particular wire. Regardless, if that were still true that it couldn't handle long periods of current, there'd be common warnings against leaving lights on for hours at a time.įrom what I've read, the issue comes from a poor quality outlet build (or installation) that results in loose connections which causes energy losses due to heat - and when charging for long times, that heat builds up dramatically (as observed). Most of the plugs in your house are NEMA 5-15 (or 1-15 if ungrounded). I feel you're missing an adjective in that sentence. new 6 gauge run with a 60 50 amp fuse being installed now, hardwired to the same Siemens Versicharge. electrician said it was a failure of the outlet, likely from not torquing to spec I’m likely going to hardwire the charger (no plug) and look into adding a temperature sensor or something - and definitely a fire sensor. Welcome any comments about how to protect myself in the repair/ reinstallation. I read that EV chargers should be hardwired to avoid fault points like a plug.Īlso read that most NEMA plugs aren’t intended to handle current for long periods of time (designed for a few hours running a dryer). Melted box, all wood is charred.Ĭurious if I need to replace the entire wire (which is run through about 50 feet of walls in my house). Next morning I go out to find this near catastrophe. MS charged for a few hours then breaker tripped Plugged in a MS 75 to top off for the evening Charged friends MS 100D for 8 hrs during the day Professionally installed during home construction. Siemens versicharge 240/30A plugged into a NEMA 6-50 in a drive under garage. Fire burned casing and wall, but went out on its own. Link to pics below).ĭodged a full house fire last night. EV Charger Plug fire - be careful! (Input requested.
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |