S-1 — المواصفات العامة للتركيبات الكهربائية
E القنوات وملحقاتها
الصفحة 30 في الوثيقة الأصلية
عرض PDFE. CONDUIT & CONDUIT FITTINGS:
E.1. STANDARDS:
E.1.1 Conduits and conduit fittings shall comply with the following standards as appropriate:-
BS 4607
Non-metallic conduit fittings for electrical installations -
Specification for rigid conduits, fittings and boxes of
insulating material
IEC/BS EN 61386-1 Conduit systems for cable management - General
requirements
IEC/BS EN 60423
Conduit systems for cable management - Outside diameters
of conduits for electrical installations and threads for
conduits and fittings
E.2 NON-METALLIC CONDUITS:
E.2.1 Non-metallic conduits and conduit fittings shall be high impact, non-hygroscopic, rigid PVC and
unthreaded push type. Conduit and conduit fittings shall be in accordance with BS 4607: Part 1
and 2, IEC/BS EN 61386 or equivalent.
E.2.2 The conduit and conduit fittings shall be suitable for installation at temperature –5oC to +85 oC
and they shall not soften or suffer any degradation at these temperatures, conduit and conduit
fittings shall be self-extinguishing type.
E.2.3 Rigid PVC Conduit and conduit fittings shall be fully suitable for installation, storage or transport
temperatures encountered in Kuwait and at this temperature the material shall not soften or suffer
any structural degradation.
E.2.4 All PVC Conduit and conduit fittings shall be suitably marked and identified by the
Manufacturer. Conduits used throughout the Project shall be of one manufacturer and marking on
the conduit shall include the nominal size. All markings shall be indelible and easily legible.
E.2.5 The inside and outside surfaces of conduits shall be smooth and free from burrs, flash and other
similar defects. The interior and ends of conduit fittings shall have no sharp edges and surfaces
and corners over which the cables are likely to be drawn shall be smooth and well rounded.
E.2.6 The conduit entries of fittings shall be so designed that reliable water tight joint can be made
between the conduit and fitting. It shall be constructed in such a way that it will be possible to
bend the conduit easily with the aid of a simple tool e.g. bending spring.
E.2.7 All joints shall be made with proper fittings and by using sealing cement (Vinyl Solvent Paint) to
ensure a watertight joint. The cement shall be of a type that remains in a sticky condition.
E.3 GALVANIZED STEEL CONDUITS:
E.3.1 Steel conduits and fitting should be of heavy gauge, longitudinally welded type and comply with
IEC/BS EN 60423, IEC/BS EN 61386 or equivalent.
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E.3.2 The nominal minimum outside diameter of any rigid conduit to be used should be 16 mm with a
minimum wall thickness of 1.4 mm. and the conduits shall be completed with all necessary
threaded fittings, couplings and connecting devices having galvanised equivalent finish.
E.3.3 Conduits and fittings shall be manufactured specially for electric wiring purposes. When
manufactured by a continuous weld process, weld heads both inside and outside the tube shall be
completely removed prior to galvanising.
E.3.4 All conduits and fitting shall be free from rust or other defects on delivery to the site and shall be
properly stored in covered racking so that it is protected from mechanical damage by weather and
water whilst stored on the site.
E.3.5 All conduits sh all be coupled to boxes and Trunking wires using brass male bushes. All such
bushes shall be hexagon headed, heavy duty long threaded type.
E.3.6 All conduit expansion couplings used shall be fabricated from material equal or equivalent to that
of the conduit with which the coupling is to be used, having factory installed packing ring and
pressure ring to prevent entrance and moisture. All coupling shall be equipped with earthing ring
or earthing conductor.
E.3.7 All conduit runs shall be fixed using spacer bar pattern saddles giving not less than 3mm
clearance between the conduit and the surface to which it is fixed. Saddles shall have finish to
match the conduit and saddle clips shall be secured to the bar by means of brass screws.
E.3.8 All steel conduit installation should be made mechanically and electrically continuous
throughout, be effectively earthed and comply with IEC/BS EN 60423, IEC/BS EN 61386 or
equivalent.
E.4 METALLIC FLEXIBLE CONDUITS:
E.4.1 Flexible steel conduits should comply with IEC/BS EN 61386 or equivalent. Flexible conduits
shall comprise a flexible steel core with P.V.C. over -sheath. Liquid tight flexible conduit fittings
shall be used at the terminating end of all flexible conduits.
E.4.1 Flexible conduits shall be used for protection in final connection of cables to electric motors and
other equipment subject to adjustment of position and vibration to the fixed wiring and at similar
position.
E.4.3 Flexible steel conduit should not be used as a protective conductor and it should have a separate
circuit protective conductor of adequate size for earth continuity.
E.5 NON-METALLIC FLEXIBLE CONDUITS
E.5.1 The conduit shall be heavy gauge, P.V.C. Pliable, round, either plain or corrugated of self -
extinguishing plastic material.
E.6 SUBMITTALS:
The Contractor shall submit before ordering cut-away samples of all sizes of conduits and one
conduit box of each type fixed on a wooden board, together with manufacturer's catalogues and a
test certificate from an internationally recognized authority to conf irm that the offered conduits
and accessories comply with this specification.
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E.1. STANDARDS:
E.1.1 Conduits and conduit fittings shall comply with the following standards as appropriate:-
BS 4607
Non-metallic conduit fittings for electrical installations -
Specification for rigid conduits, fittings and boxes of
insulating material
IEC/BS EN 61386-1 Conduit systems for cable management - General
requirements
IEC/BS EN 60423
Conduit systems for cable management - Outside diameters
of conduits for electrical installations and threads for
conduits and fittings
E.2 NON-METALLIC CONDUITS:
E.2.1 Non-metallic conduits and conduit fittings shall be high impact, non-hygroscopic, rigid PVC and
unthreaded push type. Conduit and conduit fittings shall be in accordance with BS 4607: Part 1
and 2, IEC/BS EN 61386 or equivalent.
E.2.2 The conduit and conduit fittings shall be suitable for installation at temperature –5oC to +85 oC
and they shall not soften or suffer any degradation at these temperatures, conduit and conduit
fittings shall be self-extinguishing type.
E.2.3 Rigid PVC Conduit and conduit fittings shall be fully suitable for installation, storage or transport
temperatures encountered in Kuwait and at this temperature the material shall not soften or suffer
any structural degradation.
E.2.4 All PVC Conduit and conduit fittings shall be suitably marked and identified by the
Manufacturer. Conduits used throughout the Project shall be of one manufacturer and marking on
the conduit shall include the nominal size. All markings shall be indelible and easily legible.
E.2.5 The inside and outside surfaces of conduits shall be smooth and free from burrs, flash and other
similar defects. The interior and ends of conduit fittings shall have no sharp edges and surfaces
and corners over which the cables are likely to be drawn shall be smooth and well rounded.
E.2.6 The conduit entries of fittings shall be so designed that reliable water tight joint can be made
between the conduit and fitting. It shall be constructed in such a way that it will be possible to
bend the conduit easily with the aid of a simple tool e.g. bending spring.
E.2.7 All joints shall be made with proper fittings and by using sealing cement (Vinyl Solvent Paint) to
ensure a watertight joint. The cement shall be of a type that remains in a sticky condition.
E.3 GALVANIZED STEEL CONDUITS:
E.3.1 Steel conduits and fitting should be of heavy gauge, longitudinally welded type and comply with
IEC/BS EN 60423, IEC/BS EN 61386 or equivalent.
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E.3.2 The nominal minimum outside diameter of any rigid conduit to be used should be 16 mm with a
minimum wall thickness of 1.4 mm. and the conduits shall be completed with all necessary
threaded fittings, couplings and connecting devices having galvanised equivalent finish.
E.3.3 Conduits and fittings shall be manufactured specially for electric wiring purposes. When
manufactured by a continuous weld process, weld heads both inside and outside the tube shall be
completely removed prior to galvanising.
E.3.4 All conduits and fitting shall be free from rust or other defects on delivery to the site and shall be
properly stored in covered racking so that it is protected from mechanical damage by weather and
water whilst stored on the site.
E.3.5 All conduits sh all be coupled to boxes and Trunking wires using brass male bushes. All such
bushes shall be hexagon headed, heavy duty long threaded type.
E.3.6 All conduit expansion couplings used shall be fabricated from material equal or equivalent to that
of the conduit with which the coupling is to be used, having factory installed packing ring and
pressure ring to prevent entrance and moisture. All coupling shall be equipped with earthing ring
or earthing conductor.
E.3.7 All conduit runs shall be fixed using spacer bar pattern saddles giving not less than 3mm
clearance between the conduit and the surface to which it is fixed. Saddles shall have finish to
match the conduit and saddle clips shall be secured to the bar by means of brass screws.
E.3.8 All steel conduit installation should be made mechanically and electrically continuous
throughout, be effectively earthed and comply with IEC/BS EN 60423, IEC/BS EN 61386 or
equivalent.
E.4 METALLIC FLEXIBLE CONDUITS:
E.4.1 Flexible steel conduits should comply with IEC/BS EN 61386 or equivalent. Flexible conduits
shall comprise a flexible steel core with P.V.C. over -sheath. Liquid tight flexible conduit fittings
shall be used at the terminating end of all flexible conduits.
E.4.1 Flexible conduits shall be used for protection in final connection of cables to electric motors and
other equipment subject to adjustment of position and vibration to the fixed wiring and at similar
position.
E.4.3 Flexible steel conduit should not be used as a protective conductor and it should have a separate
circuit protective conductor of adequate size for earth continuity.
E.5 NON-METALLIC FLEXIBLE CONDUITS
E.5.1 The conduit shall be heavy gauge, P.V.C. Pliable, round, either plain or corrugated of self -
extinguishing plastic material.
E.6 SUBMITTALS:
The Contractor shall submit before ordering cut-away samples of all sizes of conduits and one
conduit box of each type fixed on a wooden board, together with manufacturer's catalogues and a
test certificate from an internationally recognized authority to conf irm that the offered conduits
and accessories comply with this specification.
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