climbing distance from when the vertical flame test is required

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asaq

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hi

the NFPA 79 distinguishes horizontal flam test and vertical flam test. There are now cables which are vertikal proofed (FT-2) either or horizontal (VW-1). The whole is specified according to the UL 1581. Now I ask the question from when I have to use cables which are checked according to the horizontal method. How high is the maximal rising climb with a cable which has only a vertical flame test.
Nothing, is no answer, we have always a little rippel, sometimes we have to overcome a pipe or go through an opening.
Is there an climbing distance from when the vertical flame test is required?

.... and sorry for my bad english

bg Ber
 
The standards may have changed, however as far as I know, CMR (riser) cable is permitted anywhere where lower cable types (CM, CMX) are permitted. CMP (plenum) is above those ratings. I do not know what type of cable you have.

There are UL standards for vertical flame test, of course. How this cable performs when installed horizontally is largely irrelevant imho, since a) the riser standard is harsher and b) if you have cable on fire above a fire rated ceiling (or in a wall), the structure is probably in serious trouble already. Some job specs call for cables or conductors to be installed in a metal raceway. In the case of communication cables, I believe that chapter 8 installs do not require CMR cable if the raceway is metal.

I am not familiar with FT-2 and VW-1 standards. In the states (US), that the cable is marked CMR is good enough to run between floors and horizontally anywhere, other than a plenum or air-handling space.
 
asaq said:
hi

the NFPA 79 distinguishes horizontal flam test and vertical flam test. There are now cables which are vertikal proofed (FT-2) either or horizontal (VW-1). The whole is specified according to the UL 1581. Now I ask the question from when I have to use cables which are checked according to the horizontal method. How high is the maximal rising climb with a cable which has only a vertical flame test.
Nothing, is no answer, we have always a little rippel, sometimes we have to overcome a pipe or go through an opening.
Is there an climbing distance from when the vertical flame test is required?

.... and sorry for my bad english

bg Ber
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You are mixing your standards. NFPA 79 is relevant to the US, FT-2 is a CSA specification for appliance cables.

http://www.carrmfg.com/blog/a-brief-introduction-to-ul-and-csa-cable-flammability-tests/

From that it appears FT-2 is for flexible appliance cords so would preclude it being used for permanent wiring, running in conduit, etc.
 
Hi,

we install part of a machine for laminating. Therefore we are working with the NFPA 79 "Electrical Standard for Industrial Machinery". We use the AWM Wiring material according to 12.9.2 (2). For each conductors we have to decide which one we have to use. The AWM conductors witch have a vertical flame test passed are more expensive as the others. Most of the conductors are installed in a horizontal raceway undernece of the conveyor, but somtime we have to rise with the cables over a pipe (rising high approx 3 ft. approx. 1 m ). These is the background of my question. the mention of VW-1 and FT-2 is a quote of the NFPA 79 section 12.9. 2 (3).

thanks ber
 
In general the vertical flame test is only required for wire or cables that pass from one floor of a building to another. The goal is to limit the spread of fire between floors.

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