electricalhelper-3ph-troubleshooter

When you have finished checking the (A to C Voltage), You may press the ‘Green Start P/B’ above to continue.

Press To Continue

Is the voltage at the appropriate level? 208 volts on a 208 volt 'Y' system. 240 volt on a 240 volt 'D' system. 480 volt on a 480 volt 'D' system. (+ -) 10% on most power distribution systems.

YES

No

Would You Like To Check Power On Load Side Of Disconnect Switch?

YES

No

When you have finished checking the (D to E Voltage), You may press the ‘Green Start P/B’ above to continue.

Press To Continue

Don’t forget to submit your information.

Press the P/B to continue.

Notice: If you are not experienced in troubleshooting electrical circuits, DO NOT PROCEED. Call an experienced electrician. This procedure is only an aid and not intended for training. We at Electrical Helper.com assume no liability for any use or misuse of the information contained herein.

• If you answered no, then you must check the voltage from where the power is being supplied to your load.

• You will have to keep back tracking until you find where the voltage is proper between all three lines as previously described.

• On the chance the voltage is not good at the building entrance - Contact your power supplier.

When you have finished checking the (D to F Voltage), You may press the ‘Green Start P/B’ above to continue.

Press To Continue

When you have finished checking the (E to F Voltage), You may press the ‘Green Start P/B’ above to continue.

Is the voltage at the appropriate level between (D - E - F)? 208 volts on a 208 volt 'Y' system. 240 volt on a 240 volt 'D' system. 480 volt on a 480 volt 'D' system. (+ -) 10% on most power distribution systems.

YES

No

Notice: If you are not experienced in troubleshooting electrical circuits, DO NOT PROCEED. Call an experienced electrician. This procedure is only an aid and not intended for training. We at Electrical Helper.com assume no liability for any use or misuse of the information contained herein.

If the voltage is proper then proceed to the next Step and if not you have a bad 'A Phase' in your circuit breaker or in the case of a fused disconnect, a bad 'A Phase' fuse.

YES

No

Notice: If you are not experienced in troubleshooting electrical circuits, DO NOT PROCEED. Call an experienced electrician. This procedure is only an aid and not intended for training. We at Electrical Helper.com assume no liability for any use or misuse of the information contained herein.

If the voltage is proper then proceed to the next Step and if not you have a bad 'B Phase' in your circuit breaker or in the case of a fused disconnect, a bad 'B Phase' fuse.

YES

No

Notice: If you are not experienced in troubleshooting electrical circuits, DO NOT PROCEED. Call an experienced electrician. This procedure is only an aid and not intended for training. We at Electrical Helper.com assume no liability for any use or misuse of the information contained herein.

If the voltage is proper then proceed to the next Step and if not you have a bad 'C Phase' in your circuit breaker or in the case of a fused disconnect, a bad 'C Phase' fuse.

YES

No

If you do not have good voltage between (D-E-F) on the load side of your disconnect or circuit breaker, you can lock out and tag out the supply voltage serving the (A-B-C) line side terminals.

YES

If this proceedure is used, you must test A-B to be sure there is no voltage present. A-C to be sure there is no voltage present. B-C to be sure there is no voltage present. after the service has been locked out and tagged.

Notice: Be sure your circuit breaker or disconnect is closed (In the ON Position). At this point you can use your ohm meter, test for low resistance between terminals A-D being certain the resistance is 0 ohms. B-E being certain the resistance is 0 ohms. . C-F being certain the resistance is 0 ohms.

If you incounter a high resistance reading in any of the above tests, you have found your problem and must resolve the issue.

If not please call 1-800-226-4917 to discuss your problem with a live person.