Fire Resistive Cable

First a concern was brought to ul s attention that when fire resistive cables were installed in conduit with a zinc coating the circuit integrity was compromised by a reaction of the zinc with the copper conductors lowering.

Fire resistive cable.

Bs 7629 1 300 500v fire resistant electric cables with non corrosive gases and low emission of smoke when affected by fire. Category standard 60 when tested in accordance with bs en 50200 method of test for resistance to fire of unprotected small cables for use in emergency circuits. Bs 7846 electric cables. The definition of a fire resistive or fire rated cable is a cable that will continue to operate in the presence of a fire.

Mineral insulated mi cable has provided this added protection for decades. Specification for 300 500 v fire resistant screened cables having low emission of smoke and corrosive gases when affected by fire multicore and multipair cables. A flame resistant cable in this manner would let the circuit stay in operation allowing power to be transferred through it while this would not be the case with a flame retardant cable. Fire resistant vs flame retardant cables.

For use as ci cable installation follows the nec and local code. Fire resistive cables are required per nfpa 70 articles 517 695 700 708 and 760 as well as nfpa 72 nfpa 101 nfpa 130 and nfpa 502 lifeline power cables. They have passed rigorous ul fire resistive testing maintaining a constant signal connection for two hours at 1850 f. Vitalink is available in the us and canada.

This is commonly known as a circuit integrity ci cable and is 2 hour fire rated. Low smokes cables have a sheath designed to limit the amount of smoke and toxic halogen gases given off during fire situations. What are fire resistive or fire rated cables. Ulc listed fire resistant cable circuit integrity rating cir cable fhjrc there are two issues here.

Thermosetting insulated armoured fire resistant cables of rated voltage 600 1000 v having low emission of smoke and corrosive gases when affected by fire. Refer to installation instructions for hardware certifications. Fhit 40a and fhit7 40a for use as cic cable installation follows fhit 40a fhit7 40a and comtran s installation instructions. An important distinction exists between fire resistant cables and flame retardant cables even though both of them are subjected to various fire performance tests in order to earn their respective classification.

A fire resistant cable will continue to function in the event of a fire and is also identified as a circuit integrity cable a flame retardant cable on the other hand will not propagate or convey a fire. In addition to the dual rated ci cic cables vitalink now includes the industry s only armored and ethernet cables approved to ul 2196. Refer to r27557 fire resistive cable ul vitalink brand type fplr ci st1 cmr ci ls cl3r ci st1 for use in system no. Fire resistant and fire retardant cable sheaths are design to resist combustion and limit the propagation of flames.