joshfromoshoto
Member
- Location
- Wyoming
- Occupation
- Electrician
I recently had to use a megger to test potentionally bad underground cables that power parking lot lights. On phase a I got an immediate 4000 meg ohm reading which is the highest the megger could read, and on phase b I got roughly 600 meg ohms. The circuit keeps tripping and it does not appear to be and of the wiring inside of the light. Am I reading the megger wrong? I had someone tell me that 1 meg ohm per 1kv of operating voltsge was acceptable, so according to him, 600 meg ohms should be more than enough. I guess I really don't understand the instrument itself and any help would be appreciated.
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