How many main bonding jumpers are needed if there are six disconnects in separate enclosures?

In the case of having six disconnects in separate enclosures, each disconnect must be properly bonded to ensure safety and compliance with electrical codes. A main bonding jumper is necessary for each separate system or enclosure to provide a low-resistance path for fault currents and to maintain proper grounding connections.

When there are multiple disconnects in separate enclosures, each enclosure typically requires its own main bonding jumper. Therefore, if there are six separate disconnects, it would be necessary to install six individual main bonding jumpers—one for each disconnect. This ensures that each disconnect is adequately grounded, which is crucial for effective fault current protection and overall system safety.

This approach aligns with the requirements outlined in grounding and bonding standards, which seek to minimize the risk of electrical hazards. Since each enclosure functions independently in its grounding scheme, the need for a bonding jumper for each one is essential.