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(F) Manholes
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Underground Class 2 and Class 3 circuit conductors in a manhole shall be permitted to be installed with Class 1, non-power-limited fire alarm and medium-power network-powered broadband communications circuits where one of the following conditions is met:
- The electric light, power, Class 1, non-power-limited fire alarm and medium-power network-powered broadband communications circuit conductors are in a metal-enclosed cable or Type UF cable.
- The Class 2 and Class 3 circuit conductors are permanently and effectively separated from the conductors of other circuits by a continuous and firmly fixed nonconductor, such as flexible tubing, in addition to the insulation or covering on the wire.
- The Class 2 and Class 3 circuit conductors are permanently and effectively separated from conductors of the other circuits and securely fastened to racks, insulators, or other approved supports.
Related Code Sections
(F) Special Conditions, Manholes
Underground Class 2 and Class 3 circuit conductors in a manhole shall be permitted to be installed with Class 1, non-power-limited fire alarm ...
National Electrical Code 2020 of Minnesota > 7 Special Conditions > 725 Class 1, Class 2, and Class 3 Remote- Control, Signaling, and Power-Limited Circuits > 725.136 Separation From Electric Light, Power, Class 1, Non- Power-Limited Fire Alarm Circuit Conductors, and Medium- Power Network-Powered Broadband Communications Cables > (F) Manholes
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Control circuits and power circuits shall be permitted to be installed as underground conductors in a manhole in accordance with one of the following ...
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(L) Wiring Methods and Materials, Manholes and Handhole Enclosures
A box or conduit body shall not be required for conductors in manholes or handhole enclosures, except where connecting to electrical equipment. The ...
National Electrical Code 2020 of Minnesota > 3 Wiring Methods and Materials > 300 General Requirements for Wiring Methods and Materials > 300.15 Boxes, Conduit Bodies, or Fittings — Where Required > (L) Manholes and Handhole Enclosures