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Protected corridor lighting cabling compliance

Amanda Hancock

Hi - I'm currently working on a residential project that has a protected corridor. I'm happy with how to deal with the general wiring and compliance, however I have been asked the question regarding the cabling between the luminaire and the driver. How to make this compliant, has anyone else had this issue. Section 422.2 clearly addresses the supply cable requirements but I can't find anything relating to the driver cables. Help most appreciated.

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  • 0

    As with many things electric, there’s more than one way of choosing light fixtures, V-TAC a lighting manufacturer comment on their website “If the aim is to create a strong barrier against fire, then fire-resistant lights with 30, 60, or 90-minute ratings are the best option. On the other hand, if the goal is to provide a safe escape route during fires, lights with TP(a) or TP(b) rated covers are the way to go.”.

    www.vtacexports.com/.../what-are-fire-rated-downlights-understanding-tp-a-and-tp-b-covers

    So back to the ceiling, if the suspended ceiling is a fire barrier,  is the void above the corridor ceiling in the corridor?

    The light fixture referenced above is TP(a) Rated, I presume it’s not actually fire rated and won’t stop a fire breaching the suspended ceiling if it is a fire barrier? So the void above the ceiling is in the corridor?

    www.lighthubdirect.com/.../emergency-pro-tpa-1200x600mm-led-40w-140lm-w-light-panel-recessed-for-office-suspended-ceiling-white-4000k-neutral-white

  • 0 in reply to Sparkingchip

    The suspended ceiling is not a barrier so effectively the void is in the corridor, it's being treated as one space. The fittings selected are not fire rated as the ceiling is not a barrier so we didn't think it necessary. I've already spent time on this and spoken with manufacturers and Fire advisors etc, I was really wondering if anyone else has come across this issue and how they handled it. It sounds as if it's one for the manufacturers.

    On a side note I've had Building control reject plastics of any kind in protected staircases including the TPA & TPB types.

  • 0 in reply to Sparkingchip

    Not all suspended ceilings in the UK act as fire barriers. A suspended ceiling only functions as a fire barrier or fire-rated membrane if it is explicitly tested, certified, and installed to meet specific passive fire protection standards (such as BS 476 or EN 13501-1)

    A suspended ceiling can be either a fire barrier, a plenum, or both, depending on how the building's HVAC and fire safety strategies are designed. These two terms refer to entirely different functions—one is a safety rating, while the other is an airflow mechanism

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  • 0 in reply to Sparkingchip

    Not all suspended ceilings in the UK act as fire barriers. A suspended ceiling only functions as a fire barrier or fire-rated membrane if it is explicitly tested, certified, and installed to meet specific passive fire protection standards (such as BS 476 or EN 13501-1)

    A suspended ceiling can be either a fire barrier, a plenum, or both, depending on how the building's HVAC and fire safety strategies are designed. These two terms refer to entirely different functions—one is a safety rating, while the other is an airflow mechanism

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