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Is it necessary to provide ECC (Earth Continuity Conductor) for Single Point/ Mid-Point Bonding?

Is it necessary to provide ECC (Earth Continuity Conductor) for Single Point/ Mid-Point Bonding?

Is it necessary to provide ECC (Earth Continuity Conductor) for Single Point/ Mid-Point Bonding?

(OP)
Dear all,

The types of sheath bonding that are generally used for Cables is (a) Single Point (b) Both Point Bonding or (c) Cross-Bonding

But as we know that generally when using Single Point or Mid Point Bonding we provide with the SVL to limit the sheath voltage. What is the requirement of ECC and is it essential and must provide? Is there any alternative method of providing earthing or shall it always be under Manufacturers purview.

Thanks
Chris

RE: Is it necessary to provide ECC (Earth Continuity Conductor) for Single Point/ Mid-Point Bonding?

IEEE 575/2014 IEEE Guide for Bonding Shields and Sheaths of Single-Conductor Power Cables Rated 5 kV through 500 kV
6.3.3 Parallel ground continuity conductor :
Accordingly, it is recommended that single-point bonded and multiple single-point bonded cable installations be provided with a parallel GCC that is grounded at both ends of the route as shown in Figure 2. The spacing of this conductor from the cable circuit should be sufficiently close to limit the voltage rise of the shield/sheath to an acceptable level during a single-phase fault. The size of this conductor must be adequate to carry the full, expected fault current for the cable system.

RE: Is it necessary to provide ECC (Earth Continuity Conductor) for Single Point/ Mid-Point Bonding?

(OP)
Thank You very much @7anoter4. So it is to stop from Sheath Voltage to Rise Beyond Limits sustainable by SVL (To dissipate the Energy during Fault)

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