My installation was done today. I had originally planned to get only one NEMA14-30 for a variety of reasons I have discussed and rationalized over at another thread. But as it turns out, my existing main service panel had no space left and the maker went out of business which made getting compatible breakers impossible. Long story short I ended up redesigning the entire project and doing the following (in case this is helpful for anyone else)
- Added a new 100 Amp subpanel
- Drew out two new Romex #4 on two new 100Amp breakers from the main panel to the new subpanel. Had to move some appliance breaker circuits from main panel to new subpanel to make space for the 100Amp breakers
- Put the Tesla HPWC on one dedicated 100Amp line from the main panel
- Put a NEMA14-50 on a 50 Amp breaker
Observations:
Romex #4 are a huge PITA to work with, you get a solid burn wrestling with those in tight spaces, its very hard to maneuver it inside the new HPWC L1/L2 points with rear entry. Specially with so many extremely fragile electronic circuit wires in the vicinity. Tesla should absolutely put those in a ribbon cable or some sort of protective sheath.
The Dip switches are at 1:ON, 2:ON by default. This is not the correct config for household 240V circuits - 1:OFF, 2:ON is the correct config. This is poorly illustrated in the tesla manual. It is called out in a table but there is scope for improvement - I am a design guy and I can vouch that a picture is the BEST illustration instead of lines, tables, matrices. Of course I did not read the manual since I like to guess everything by observation and race ahead (yeah, i violated RTFM
). So when I powered on the HPWC went to 3 red flashes, which means wrong dip switch setting. So yeah, a quick 30 sec call to Tesla and everything was in order.
Main Panel with two new Romex #4 capable rated at 100Amp.
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New subpanel and HPWC on the side (HPWC not on this subpanel, but on a dedicated 100 Amp from the main service panel)
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Final pictures, drywall refinishing and painting next. And yes I got gecko's toes from Amazon mentioned upthread. I wont like the HPWC wire banging up on the drywall and gathering paint dust.
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Now what is this white wire circled in the pic below, it was frayed right out of the box and I could not find any termination point where it could have gone. Is it an extra placeholder just in case the one of the other fragile wires get damaged ? So as to not discard the entire cable and reuse it perhaps ?
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