Premise Wiring


__
 National Electric Code
Cable Substitution Hierarchy

Cable A
May be used in place of
Cable B.
 
Cable A
May be used in place of
Cable B
with restrictions.
See NEC sec.
760-51 (A) and (B).

NEC and CSA Fire Resistance Levels

Fire Resistance Level
Test Requirement
NEC 725
NEC 760
NEC 800
(Highest) Plenum Cables
UL-910 (Steiner Tunnel)
CSA-FT6 (Steiner Tunnel)
CL3P
CL2P
FPLP
MPP CMP
Riser Cables Multiple Floors
UL-1666 (Vertical Shaft)
CSA-FT4, CMG (Vertical Tray)
CL3R
CL2R
FPLR
MPR CMR
General Purpose Calbes
UL-1581 (Vertical Tray)
CSA-FT4, CMG (Vertical Tray)
CL3
CL2
FPL
MP CM
(Lowest) Residential Cables Restricted Use
UL-1581 VW-1
CSA-FT1
CL3X
CL2X
  
CMX

NOTES:

  1. Cables with a higher fire resistance level maybe substituted for those with a lower fire resistance level. Except that FT6 must also be marked FT4 applications.

  2. Cables rated CM may be used in runs penetrating one floor. (NEC 800-53)

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