Installation of insulated conductors and cables (see Appendix B)

1) Insulated conductors and cables shall not be handled or installed when the ambient temperature is sufficiently low as to be liable to cause damage to the insulation.

2) Such insulated conductors and cables shall not be installed so as to permit flexing or movement of the conductors or cables after installation if the ambient temperature is liable to become low enough to damage the insulation during flexing or movement.

3) Except as permitted by other Rules of this Code, insulated conductors and cables shall be of the types specified in Table 19 for the specific condition of use.

4) The maximum allowable conductor insulation temperature for T90 Nylon, when exposed to oil, shall be limited to 60 °C.

5) Conductor insulation shall be permitted for use where exposed to oil when marked as follows:
a) PR I with the maximum allowable conductor insulation temperature limited to 60 °C; and
b) PR II with the maximum allowable conductor insulation temperature limited to 75 °C.

6) Conductor insulation shall be permitted for use where subjected to alkaline conditions in the presence of petroleum solvents, such as in oil refineries and around gasoline storage or pump areas, when marked as follows:

a) GR I with the maximum allowable conductor insulation temperature limited to 60 °C; and
b) GR II with the maximum allowable conductor insulation temperature limited to 75 °C.

Source: Rule 12-102, CSA C22.1:21, Canadian Electrical Code, Part 1 (25th Edition), Safety Standard for Electrical Installations. © 2021 Canadian Standards Association. Please visit store.csagroup.org