Exception: 220 CMR 126.34(2)(b) does not apply to grounding or bonding conductors.
Where cable and/or equipment is to be installed in a joint use manhole or vault, it shall be done only with the concurrence of all parties concerned.
Supply and communication cables should be racked from separate walls. Crossings should be avoided.
Where supply and communication cables must be racked from the same wall, the supply cables should be racked below the communication cables.
Supply and communication facilities shall be installed to permit access to either without moving the other.
Clearances shall be maintained as specified in 220 CMR 126.34: Table 1.
Table 1
Minimum Separation Between Supply and Communications Facilities in Joint Use Manholes and Vaults
Phase-to-Phase Supply Voltage | Inches of Separation (Surface to Surface) |
0, to 15,000 | 6 |
15,001 to 50,000 | 9 |
Exception 1: These separations do not apply to grounding conductors.
Exception 2: These separations may be reduced by mutual agreement between the parties concerned when suitable barriers or guards are installed.
Exception: 220 CMR 126.34(2)(d) i. does not apply where the position of a cable, in conjunction with diagrams or maps supplied to workmen, or other means give sufficient identification.
Exception: The requirements of 220 CMR 126.34(5) do not apply to supply circuits of 550 volts or less which carry power not in excess of 3200 watts.
220 CMR 126.34