Equipment Grounding

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The bonding jumper would be a wire from one end of the flex to the other, either inside or outside the flex (as long as not subject to damage.)
 
GoldDigger said:
The bonding jumper would be a wire from one end of the flex to the other, either inside or outside the flex (as long as not subject to damage.)
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Is this bonding jumper in addition to the EGC which was required for fault clearing (when using long flex conduit), or they are the same thing? If they are two different conductors, then can I bond the single EGC to every box on this branch to meet the code without adding the said bonding jumper?
 
There is some small difference, in that an EGC would only have to pass through instead of being bonded at each end of the flex. If you bonded the EGC at each end of the flex (an allowed option, AFAIK) it would also serve as the (not necessarily required) bonding jumper.
 
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There must be a bond around the flex, the flex can not be the sole EGC other then a few circumstances up to 6 feet length, and up to 20 amps overcurrent devices - liquidtight metal flex does allow up to 60 amps overcurrent device for 3/4 to 1-1/4 size though. If the flex is used for prevention of transferring vibration it typically isn't allowed to be used as an EGC either.
 
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