Originally Posted By: rmeyers
This post was automatically imported from our archived forum.
I have inspected several installations lately where the main disconnect was on the building exterior next to the meter for emergency access by fire departments. (Usually on condos or duplexes but becoming more frequent on single family) Also had one where the entire breaker panel was on the exterior of the house. Bad planning in my book, especially for those stormy winter nights when a breaker trips for whatever reason. Probably 50' from nearest door. Passed by local jurisdiction (25 years ago).
I usually also look for a rating on the panel box or enclosure.
Size and type of wire for service entrance will also determine service capacity. (General rule of thumb)
AWG#2 copper - 125 Amps Aluminum - 100 Amps
AWG#1 copper - 150 Amps Aluminum - 110 Amps
1/0 copper - 175 Amps Aluminum - 125 Amps
2/0 copper - 200 Amps Aluminum - 150 Amps
3/0 Aluminum - 175 Amps
4/0 Aluminum - 200 Amps
Some of our electrical wizards will hopefully be able to share more technical details on this subject.
In general the weakest link of all the service components will determine what the actual "safe" rating of the system is.
Don't know if this helps, just rambling! ![icon_eek.gif](upload://yuxgmvDDEGIQPAyP9sRnK0D0CCY.gif)