J
Jake1579
Im on an electrical installation course in college and currently on a 3 month trial as an apprentice so thats why im asking zs testing from what i understand in college they teach it you as zs=ze + r1/r2 which i understand but when i go and actually look at zs test myself say on youtube they talk about like for example a ligthing circuit to test it at the switch line and the earth on the celing rose or light switch depending if its awkward to get to but they say test at the last lighting point so my questions are
1. why do you need to test at the last point?
2. does this test take in to account the ze and r1/2?
1. why do you need to test at the last point?
2. does this test take in to account the ze and r1/2?