YouConduit!
Member
- Location
- Midwest
- Occupation
- Electrical Design
Hey all, a few questions regarding hybrid copper-fiber armored cable and how it can be installed with other 120V circuits:
NEC 300.3(C) allows AC and DC conductors of different systems to share the same raceway or enclosure provided that the AC voltage is less than 1000V and the DC voltage is less than 1500V, AND all conductor insulation is rated for (at least) the maximum system voltage.
NEC 770.133(A) allows fiber to share the same cable tray or raceway with conductors less than 1000V.
So...
Can a hybrid copper-fiber armored cable be in the same raceway as a 120V lighting circuit provided that the copper conductors in the hybrid cable have insulation rated at least 120V? The hybrid copper cables and fiber go to a 48VDC load (communications equipment). All loads are on a pole.
Do NEC sections 724/725 apply at all here?
Would innerduct be best practice for this application to keep 120V power and the hybrid cable separate within a larger raceway?
Please let me know your thoughts/experience! Thanks in advance.
NEC 300.3(C) allows AC and DC conductors of different systems to share the same raceway or enclosure provided that the AC voltage is less than 1000V and the DC voltage is less than 1500V, AND all conductor insulation is rated for (at least) the maximum system voltage.
NEC 770.133(A) allows fiber to share the same cable tray or raceway with conductors less than 1000V.
So...
Can a hybrid copper-fiber armored cable be in the same raceway as a 120V lighting circuit provided that the copper conductors in the hybrid cable have insulation rated at least 120V? The hybrid copper cables and fiber go to a 48VDC load (communications equipment). All loads are on a pole.
Do NEC sections 724/725 apply at all here?
Would innerduct be best practice for this application to keep 120V power and the hybrid cable separate within a larger raceway?
Please let me know your thoughts/experience! Thanks in advance.