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Bonding Jumper, System. (System Bonding Jumper) The connection between the grounded circuit conductor and the supply-side bonding jumper, or the equipment grounding conductor, or both, at a separately derived system. (CMP-5) Click to expand... infinity Moderator. Staff member. Location New Jersey

System bonding jumper requirements, found in Section 250.30(A)(1), are slightly different. This section still requires that the system bonding jumper be unspliced and connect the equipment grounding conductor(s) and the equipment enclosure to the grounded conductor for the same reason as the main bonding jumper in the service. ...

System bonding jumper. The system bonding jumper is a conductor, screw, or strap that bonds the metal parts of an SDS to the system neutral point [250.2]. The system bonding jumper provides a low-impedance fault current path to the power supply to facilitate the clearing of a ground fault by opening the circuit overcurrent device.

If the system bonding jumper isn’t properly installed (Photo 1 and Photo 2), an effective ground-fault current path will not be established. Table 250.66 of the 2011 NEC is used to size the system bonding jumper based on the size of the derived ungrounded circuit conductors supplied by the secondary of the transformer.

Article 250 Grounding and Bonding of the NEC is perhaps the most misinterpreted and misapplied in the Code. In a solidly grounded system, the system bonding jumper must be installed at the same location where grounding electrode conductor terminates to the neutral terminal of a separately derived system.

Use Table 250.102(C)(1) for sizing grounded conductors, main bonding jumper, system bonding jumper and supply-side bonding jumper for AC systems based on the size of the largest ungrounded conductor. Notice the requirement to use the notes found at the bottom of the table if ungrounded conductors are over 1,100 kcmil.

A system bonding jumper must be installed between the neutral terminal of a separately derived system and the circuit equipment grounding conductor [Article 100 Bonding Jumper, System and 250.30(A)(1)]. The bonding jumper can be a wire, bus, or screw [250.28]. If the bonding jumper is a screw, it must be identified with a green finish visible ...

Main and system bonding jumpers are vital components of the ground-fault current path and must have the correct size per Section 250.28. Image used courtesy of Pixabay . Section 250.25. This section deals with the grounding of supply-side disconnects that are not considered a service–located in casings segregated from the service equipment ...

Bonding jumpers are critical components in electrical systems, ensuring safety, reliability, and compliance with electrical codes. These flexible conductors are used to establish electrical continuity between metal parts or between a grounding system and electrical components. By creating a low-resistance …

The system bonding jumper (SBJ) is the connection between the grounded circuit conductor and the supply side bonding jumper (SSBJ), or the equipment grounding conductor or both at the separately derived system (the transformer) "If the doors of perception were cleansed everything would appear to man as it is, Infinite. William Blake

The “system bonding jumper” is what needs to be sized for the secondary amperage. 10-616 covers sizing a “system bonding jumper”. The pic also shows how the bond run with the primary can be used to ground the transformer so no need for a ground conductor or an electrode at the transformer

The 2014 National Electrical Code uses several terms for bonding jumpers. A main bonding jumper is found at the service equipment or “Main”. A system bonding jumper can be found at a separately derived system. A good example of a system bonding jumper is the connection between the XO terminal and ground inside of a transformer.

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Fig. 1. Size the system bonding jumper per Table 250.102(C)(1). A system bonding jumper must be installed at the same location where the grounding electrode conductor (GEC) terminates to the neutral terminal of the separately derived system; either at the separately derived system or the system disconnecting means, but not at both locations [250.30(A)(1) and (5)].

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