Appendix
126
Siemens Building Technologies
Fire Safety & Security Products
09.2008
16.14 Appendix O: Wiring of Mains Cable to the SPC Controller
Requirements:
A readily accessible approved disconnect device must be incorporated in the
building installation wiring. This must disconnect both phases at the same time.
Acceptable devices are switches, circuit breakers, or similar devices
z
Minimum size conductor used for connecting mains is 1.5 mm square
z
The circuit breakers must have a maximum rating of 16 amps
Mains cable when fitted shall be secured as per the diagram below
The mains cable is secured to the metal V shaped bend in the base plate, via a tie
wrap such that the metal bend is between the cable and the tie wrap. The tie wrap
must be pulled extremely tightly such that when the cable is tugged there is no
movement in the cable relative to the tie wrap.
The mains cable must be an approved type and marked HO5 VV-F or HO5 VVH2-
F2.
The plastic tie wrap must be flammability rated V-1.
Fig. 21
Cable tie connection to metal indent in base of cabinet
