i’m studying to become a home inspector. anyways i was inspecting the electrical panel for my house and was wondering about this stuff
-the overhead service drop is 3 wire
-the meter was a 200cl
-the main breaker and panel is rated 100 amps
-the SEC was in this gray sheathing that looked weatherproof but didn’t have any UL labeling. does exterior conduit or SEC cable have to be labeled?
-i couldn’t find any labeling on the sheathing of the individual SEC cables that feed the breakers but they almost filled the entire space of their terminals. how do i determine the gauge and if it is ok for the main breaker rating?
-four wires came through the SEC feed. one was a white cable that bonded the neutral bus bar. there is a rigid conduit near the meter that goes into the ground. is that ok or could the ground be tapped to the SEC neutral?
-the three SEC wires were all black but one of them terminated right before entering the panel with the conductors exposed. can i assume that this is just an extra cable that is not active or is this a serious problem?
-there is a large gauge wire tapped into one of the neutral bus bar terminals that all the receptacles are tapped to and simply exits the house and buries straight into the ground. is that for grounding and does that work?
thanks in advance for your help, i can’t wait to become a NACHI inspector.