slimf
Member
- Joined
- Sep 26, 2017
- Messages
- 132
My powerwall has been running for over a week now and I’ve noticed there is a section of cable between the fuse block and circuit breaker that gets warm when under heavy sustained load.
It’s a 48v system and I use 70mm flexible welding cable and quality Cabec brand crimps - which were double crimped with a hydraulic crimp tool.
When pushing 70-80 amps I notice a small section of both positive and negative get warmer to touch than the rest.
Using a laser temperature meter I found the ‘cold’ parts of the cable at 28 deg C. The warmer parts were at 33 dec C - and perhaps when under the higher end of load 82amp they may have got 3-5 deg warmer than that. Still under 40 deg C.
Ambient today was around 28.
Is this common or have I got some bad crimps?
I also thought maybe the heat was being introduced to the cable from either the fuse block or circuit breaker - but hard to tell?
It’s a 48v system and I use 70mm flexible welding cable and quality Cabec brand crimps - which were double crimped with a hydraulic crimp tool.
When pushing 70-80 amps I notice a small section of both positive and negative get warmer to touch than the rest.
Using a laser temperature meter I found the ‘cold’ parts of the cable at 28 deg C. The warmer parts were at 33 dec C - and perhaps when under the higher end of load 82amp they may have got 3-5 deg warmer than that. Still under 40 deg C.
Ambient today was around 28.
Is this common or have I got some bad crimps?
I also thought maybe the heat was being introduced to the cable from either the fuse block or circuit breaker - but hard to tell?