Code of Massachusetts Regulations
220 CMR - DEPARTMENT OF PUBLIC UTILITIES
Title 220 CMR 126.00 - Underground Electric Supply And Communication Lines 50,000 Volts And Below
Section 126.37 - Supply Cable Terminations

Universal Citation: 220 MA Code of Regs 220.126

Current through Register 1531, September 27, 2024

(1) General.

(a) Cable terminations shall be designed and constructed to meet the requirements of 220 CMR 126.33(4).

(b) A cable termination shall be designed to prevent moisture access to the cable insulation where such penetration is detrimental to the cable.

(c) Where clearances between parts at different potential are reduced below those adequate for the voltage and Basic Impulse Level (BIL), suitable insulating barriers or fully insulated terminals shall be provided to meet the required equivalent clearances.

(2) Support at Terminations.

(a) Cable terminations shall be secured and supported in a manner designed to maintain their installed position.

(b) Cable shall, where necessary, be supported or secured in a manner designed to prevent the transfer of damaging mechanical stresses or bending to the termination, equipment or structure.

(3) Identification. Suitable circuit identification shall be provided for all terminations. Exception: This requirement does not apply where the position of the termination, in conjunction with diagrams or maps supplied to workmen, gives sufficient identification.

(4) Separations and Clearances in Enclosures or Vaults.

(a) Adequate electrical clearances and separations of supply terminations shall be maintained, both between conductors and between conductors and ground, consistent with the type of terminator used.

(b) Where exposed live parts are in an enclosure, clearances and separations or insulating barriers adequate for the voltages and the design Basic Impulse Level (BIL) shall be provided.

(c) Where a termination is in a vault, uninsulated live parts are permissible provided they are guarded or isolated.

(5) Grounding.

(a) All exposed conducting surfaces of the termination device, other than live parts, and equipment to which it is attached shall be effectively grounded and/or bonded.

(b) Conductive structures supporting cable terminations shall be effectively grounded. Exception: Grounding and/or bonding is not required where the above parts are isolated or guarded.

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