S-1 — المواصفات العامة للتركيبات الكهربائية
AA التركيب الكهربائي العام
الصفحة 82 في الوثيقة الأصلية
عرض PDFAA. General Electrical Installation:
AA.1 The installation shall be carried out in accordance with the latest issue of M.E.W. Regulations
For Electrical Installation.
AA.2 Throughout the electrical installation the Loop-In system of wiring shall be employed.
AA.3 The general electrical installation shall be carried out by means of single core P.V.C. insulated
Cables in conduits or in trunkings. Where the conduits are buried in the wall, ceiling or floor, P.V.C.
conduits and accessories shall be used. For surface installation galvanized conduits and accessories
shall be used in location where they will be subjected to mechanical damage.
AA.4 Trunking with accessories shall be used where large numbers of single core P.V.C. insulated
cables are run together. The size of trunking and accessories shall be such that a space factor of
45 % is not exceeded.
AA.5
Particular attention shall be given to the following:-
a) The installation shall be neat, tidy and all runs in walls shall be truly vertical or horizontal.
b) The conduit system, joint boxes, loop boxes etc., shall be firmly supported.
c) The system shall be clean and free of sharp edges, burrs etc.
d) Due allowance shall be made for expansion and contraction.
e) As far as possible conduit runs shall not cross building expansion joints; where they do,
flexible conduit joints shall be provided.
AA.6 Conduit shall be installed at least 150 mm clear of, and preferably under, hot pipes (steam or
water) and 50mm clear of gas, water and any other services.
AA.7 Not more than two right angle bends shall be allowed in any conduit run without the provision of
an inspection fitting for drawing in purposes between them.
AA.8 Conduits shall not be dismantled for wiring, and must be capable of being wired complete without
draw wires being installed during erection.
AA.9 Where false ceilings exist, all conduits shall be fixed to the truss or to the surface of the slabs and
dropped to loop-in boxes at false ceiling level.
Conduits shall not be run over the supports intended to carry false ceiling without prior
permission of the Engineer.
AA.10 For galvanized steel conduit all the joints shall be screwed, care shall be taken in planning the
conduit runs to avoid the use of running joints. All conduit shall be free from rust patches or
mechanical damage and shall be adequately protected from damage whilst stored on site. All
exposed threads, die marks and other abrasions shall be painted with two coats of an approved
metallic paint immediately the conduit is installed.
82
AA.11
AA.12
AA.13
A.14
AA.1 The installation shall be carried out in accordance with the latest issue of M.E.W. Regulations
For Electrical Installation.
AA.2 Throughout the electrical installation the Loop-In system of wiring shall be employed.
AA.3 The general electrical installation shall be carried out by means of single core P.V.C. insulated
Cables in conduits or in trunkings. Where the conduits are buried in the wall, ceiling or floor, P.V.C.
conduits and accessories shall be used. For surface installation galvanized conduits and accessories
shall be used in location where they will be subjected to mechanical damage.
AA.4 Trunking with accessories shall be used where large numbers of single core P.V.C. insulated
cables are run together. The size of trunking and accessories shall be such that a space factor of
45 % is not exceeded.
AA.5
Particular attention shall be given to the following:-
a) The installation shall be neat, tidy and all runs in walls shall be truly vertical or horizontal.
b) The conduit system, joint boxes, loop boxes etc., shall be firmly supported.
c) The system shall be clean and free of sharp edges, burrs etc.
d) Due allowance shall be made for expansion and contraction.
e) As far as possible conduit runs shall not cross building expansion joints; where they do,
flexible conduit joints shall be provided.
AA.6 Conduit shall be installed at least 150 mm clear of, and preferably under, hot pipes (steam or
water) and 50mm clear of gas, water and any other services.
AA.7 Not more than two right angle bends shall be allowed in any conduit run without the provision of
an inspection fitting for drawing in purposes between them.
AA.8 Conduits shall not be dismantled for wiring, and must be capable of being wired complete without
draw wires being installed during erection.
AA.9 Where false ceilings exist, all conduits shall be fixed to the truss or to the surface of the slabs and
dropped to loop-in boxes at false ceiling level.
Conduits shall not be run over the supports intended to carry false ceiling without prior
permission of the Engineer.
AA.10 For galvanized steel conduit all the joints shall be screwed, care shall be taken in planning the
conduit runs to avoid the use of running joints. All conduit shall be free from rust patches or
mechanical damage and shall be adequately protected from damage whilst stored on site. All
exposed threads, die marks and other abrasions shall be painted with two coats of an approved
metallic paint immediately the conduit is installed.
82
AA.11
AA.12
AA.13
A.14