755 ملحقات الأسلاك - المفاتيح المحلية

755 WIRING ACCESSORIES - LOCAL SWITCHES

755-1 All local switches shall be of adequate capacity. For outdoor use switches shall be water -tight and
metal-clad. Switches not designed to break an inductive load of its full rated capacity if used to control
discharge lighting circuits shall have a curr ent rating of not less than twice the total steady current which it is
required to carry.

755-2 Normally all local switches shall be mounted with the dollies between 1.0 m and 1.5 m above the
finished floor level. Where several switches are mounted in two or more horizontal rows, the lowest row
shall have dollies at least 1.0 m above the finished floor level. Unless prevented by the swing of the door, all
switches shall be mounted inside the room on the side of the door where the catch or lock is si tuated the
nearest switches being approximately 15 ems. from the door frame. The switch nearest the door shall
control one or more of the principal lights of the room. In large rooms where group of switches are
employed the switching arrangement shall be carried out in a symmetrical manner.

755-3 In kitchens and other situations excepting bath rooms, where water is regularly us ed, no switch shall
be mounted within two metres of any tap, basin, sink or metal drainage board if the switch is of the non -
insulated type.

755-4 In bath rooms all switches shall be of the ceiling mounted cord operated type if located inside.
Otherwise, switches shall be located in an accessible position outside the bath room and immediately
adjacent to the door.

755-5 All one way switches both single and double pole shall be so mounted that the dolly is up when the
switch is in the "OFF' position. All single pole switches shall be so connected that they control the phase lead
to the light or other consuming device.