(a)In general, connections and terminations to all conductors must retain the original electrical, mechanical, flame-retarding, and, where necessary, fire-resisting properties of the cable. All connecting devices must be suitable for copper stranded conductors.
(b)If twist-on type of connectors are used, the connections must be made within an enclosure and the insulated cap of the connector must be secured to prevent loosening due to vibration.
(c)Twist-on type of connectors may not be used for making joints in cables, facilitating a conductor splice, or extending the length of a circuit. [CGD 94-108, 61 FR 28281, June 4, 1996]