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Sparky12021986
i need your help please this question is going to be a long 1...
first let me explain the situation...
Electrical Supply
The electrical supply to the house is 230V, 50Hz, single phase and together with the installation forms part of a TN-C-S system. The electrical intake position is housed in a fibre glass enclosure adjacent to the front door, with external opening.
Electrical Installation
Distribution is by an 8-way consumer unit (C.C.U) which currently has 2 spare ways available. Existing overcurrent protection is provided by means of BS 3036, Semi enclosed (rewireable) fuses. The c.c.u is mounted at ceiling height on the inside wall directly above the electrical intake position.
The existing installation within the house and garage is wired in general purpose P.V.C insulated, P.V.C sheathed twin and earth and C.P.C multicore cables to BS 6004embedded within the fabric of the building. The extensio is to use the same wiring system and the 2 spar ways are to be used for dedicated lighting and power final circuits. Existing BS 3036 protective devices are to be replaced with Type B c.b.s to BS EN 60898.
All socket outlets are to BS 1363 and mounted 300 mm above finish floor level (f.f.l). All lighting switches are mounted at 1400 mm above f.f.l.
So after all that here is my question....
During the design stage, explain with reasons why you need to know the disconnection time of the external bulkhead type luminaire?
first let me explain the situation...
Electrical Supply
The electrical supply to the house is 230V, 50Hz, single phase and together with the installation forms part of a TN-C-S system. The electrical intake position is housed in a fibre glass enclosure adjacent to the front door, with external opening.
Electrical Installation
Distribution is by an 8-way consumer unit (C.C.U) which currently has 2 spare ways available. Existing overcurrent protection is provided by means of BS 3036, Semi enclosed (rewireable) fuses. The c.c.u is mounted at ceiling height on the inside wall directly above the electrical intake position.
The existing installation within the house and garage is wired in general purpose P.V.C insulated, P.V.C sheathed twin and earth and C.P.C multicore cables to BS 6004embedded within the fabric of the building. The extensio is to use the same wiring system and the 2 spar ways are to be used for dedicated lighting and power final circuits. Existing BS 3036 protective devices are to be replaced with Type B c.b.s to BS EN 60898.
All socket outlets are to BS 1363 and mounted 300 mm above finish floor level (f.f.l). All lighting switches are mounted at 1400 mm above f.f.l.
So after all that here is my question....
During the design stage, explain with reasons why you need to know the disconnection time of the external bulkhead type luminaire?