4 ms·
You should test if they are hot before you flip the breaker, then test again after. If you only test after you are not protected against faulty test equipment o
by Cerium 8y ago
You should test if they are hot before you flip the breaker, then test again after. If you only test after you are not protected against faulty test equipment or improper wiring.
- alkonaut 8y agoYes. This was assuming the light was shining (or equiv, that it showed 230V) before work starts of course.