mod72346
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- Mod
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- Nov 22, 2021
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- Location
- California, USA
- Vehicles
- Taycan 4S 2021
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- #1
I have a standard Porsche charger (w/o LED display) and I've been using it a few times to charge at at home. I have two questions:
- The circuit is 50A, but the maximum charging power I've seen is only 8.67 kW, or ~36A - why is it not at least 40A?
- The NEMA 14-50 plug gets extremely hot - can't hold touching it, it's burning. There are similar threads about this (e.g. https://www.taycanforum.com/forum/threads/nema-14-50-supply-cable-heat-data.1940/) that seem to blame the short NEMA 14-50 cable, which does get quite hot too. So, I bought a thermal camera and took a look today. To my surprise, the problem is not with the outlet - the hot spots are clearly on both sides of the plug INSIDE THE PLASTIC where the two phases are. This is really concerning. After ~20 min of charging, the plug temperature reached 80C or 176F -- which I think is dangerous, and it's not even at full amperage. What's going on? Is the cable defective? Should I take it to Porsche? What do I tell them?
Please help.
See two photos attached with the plug, which I took out of the electrical box to troubleshoot the heating issue, and the thermal image, which indicates that the hottest spot is on the side of the plug.
BTW, it's Hubbell.
UPDATE: After running for 45 min, the plug hotspot reached 88.2 C (or 190 F):
- The circuit is 50A, but the maximum charging power I've seen is only 8.67 kW, or ~36A - why is it not at least 40A?
- The NEMA 14-50 plug gets extremely hot - can't hold touching it, it's burning. There are similar threads about this (e.g. https://www.taycanforum.com/forum/threads/nema-14-50-supply-cable-heat-data.1940/) that seem to blame the short NEMA 14-50 cable, which does get quite hot too. So, I bought a thermal camera and took a look today. To my surprise, the problem is not with the outlet - the hot spots are clearly on both sides of the plug INSIDE THE PLASTIC where the two phases are. This is really concerning. After ~20 min of charging, the plug temperature reached 80C or 176F -- which I think is dangerous, and it's not even at full amperage. What's going on? Is the cable defective? Should I take it to Porsche? What do I tell them?
Please help.
See two photos attached with the plug, which I took out of the electrical box to troubleshoot the heating issue, and the thermal image, which indicates that the hottest spot is on the side of the plug.
BTW, it's Hubbell.
UPDATE: After running for 45 min, the plug hotspot reached 88.2 C (or 190 F):
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