ray801•16d ago

This week I finally landed a 400 amp service upgrade without a single callback

Job was at an old bakery downtown Chicago, and the existing panel was so rusted out I had to rebuild the whole gutter. Has anyone else had good luck with the newer Square D homeline breakers holding up on high draw equipment?

3 comments

3 Comments

henderson.wesley16d ago

Bet the old bakery's ground wire was undersized from day one, had to deal with that on a similar job.

pat_coleman16d ago

Honestly, I'd look at the conduit bonding before blaming the ground wire. Undersized grounds are pretty rare unless someone really messed up the load calc.

casey_harris8d ago

Last time I trusted my ground wire math I ended up tripping the whole block's power.