Electrical wiring and switchgear

• Pages: 55-56

A9. Elecfrical wiring and switchgear

A9.1. General

A9. 1.1.In view of its importance from the point of view of

safety, electrical wiring associated with lifts should be designed

and installed with the utmost care.The wiring should be in

conformity with the rules in force in the country where the lift is

installed.

A9.l.2. (1) Every precaution should be taken to prevent

incidents and accidents that could result from accidental contact

with conductors or from insulation faults to earth or between

conductors.

(2) In particular, one or more insulation faults to earth should

neither cause the lift to start nor render the safety devices ineffective.

A9.2. Protection of motors

A9.2.l. Lift motors should be protected against overloading

and short circuits.

A9.2.2. Every measure should be taken to prevent damage to

equipment in case of failure of a single phase of the electricity

supply.

A9.3. Contactors and relays

A9.3.l. In view of the fundamental role which contactors and

relays play with regard to safety, such equipment should be

selected with the utmost care.It should be of sound design and

construction, and itsspecifications should correspond to the

operating conditions.

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