thread238-248237
A previous thread on this subject has been closed, but the question was not answered correctly.
The O.P. had asked if it was ok to run the EGC on the outside of an existing cable, in an existing installation.
The thread ended when someone posted the text of NEC code section 300.3(B), which stated that you can not run an EGC outside of the raceway carrying the circuit conductors.
However, in the O.P.'s case, an EXISTING INSTALLATION, 300.3(B)(2) states "Euipment Grounding conductors shall be permitted to be installed outside a raceway or cable assembly where in accordance with the provisions of 250.130(C) for certain EXISTING INSTALLATIONS".
I believe the wording includes "CERTAIN existing installations" so an AHJ or inspector may still refuse to accept such an install. But, in a case where existing cables are to be used for a new purpose(such as for temporary power), it may be deemed more practical to run an external EGC than pull an entirely new cable, and this section of the code provides a solution for such corcumstances.
A previous thread on this subject has been closed, but the question was not answered correctly.
The O.P. had asked if it was ok to run the EGC on the outside of an existing cable, in an existing installation.
The thread ended when someone posted the text of NEC code section 300.3(B), which stated that you can not run an EGC outside of the raceway carrying the circuit conductors.
However, in the O.P.'s case, an EXISTING INSTALLATION, 300.3(B)(2) states "Euipment Grounding conductors shall be permitted to be installed outside a raceway or cable assembly where in accordance with the provisions of 250.130(C) for certain EXISTING INSTALLATIONS".
I believe the wording includes "CERTAIN existing installations" so an AHJ or inspector may still refuse to accept such an install. But, in a case where existing cables are to be used for a new purpose(such as for temporary power), it may be deemed more practical to run an external EGC than pull an entirely new cable, and this section of the code provides a solution for such corcumstances.