仪器仪器电缆常见问题解答
What are BS5308 Cables?
BS5308 is a British Standard, which covers the requirements for a range of instrumentation & signal cables. It is divided into two parts. BS 5308 Part 1 covers polyethylene insulated cables used mainly by the petroleum industry. It specifies requirements for and dimensions of polyethylene insulated cables in pairs with or without screens – optionally incorporating single wire armour or a lead sheath with single wire armour. BS 5308 Part 2 covers PVC insulated cables, used mainly in the chemical and petrochemical industries.
What is the difference between BS5308 cable, PAS 5308 cable and EN 50288-7 cable?
| BS5308-1 | BS5308-2 | PAS5308-1 | PAS5308-2 | EN 50288-7 | |
|---|---|---|---|---|---|
| conductor: | |||||
| kind of conductor | solid or stranded multistranded (BS 6360) | stranded multistranded (BS 6360) | solid or stranded multistranded (BS EN 60228) | stranded multistranded (BS EN 60228) | solid stranded multistranded (HD383=IEC 60288 (cl. 1, 2, 5)) |
| copper | plain annealed copper | plain annealed copper | plain annealed copper | plain annealed copper | plain annealed or metal coated |
| dimension | 0.5; 0.75; 1.0; 1.5 mm² | 0.5; 0.75; 1.5 mm² | 0.5; 1.0; 1.5; 2.5 mm² | 0.5; 0.75; 1.5,2.5 mm² | 0.5; 0.75; 1.0; 1.3; 2.0; 2.5; (4.0) mm² |
| Insulation: | |||||
| materials | PE type 03 acc. to BS 6234 | PVC type TI1 acc. to BS 6746 | thermoplastic PE to BS EN 50290?2?23:2002, grade L/MD or a cross?linked PE to BS EN 50290?2?29. |
PVC to BS EN 50290-2-21:2002, grade TI51. |
a) PVC to EN 50290-2-21 b) Polyethylene to EN 50290-2-23 c) Polypropylene to EN 50290-2-25 d) Halogen free f1ame retardant compound to EN 50290-2-26 e) Cross-linked polyethylen to EN 50290-2-29 |
| range | 300/500V | 300/500V | 300/500V | 300/500V | 90V 300V 500V |
| thickness | LINK 1 | LINK 1 | LINK | LINK | link |
| Cable elements: | |||||
| kind of elements | core pair (twisted) quad (around a single dummy; only for 2 pair) | core pair (twisted) quad (around a single dummy; only for 2 pair) | core pair (twisted) quad (around a single dummy; only for 2 pair) | core pair (twisted) quad (around a single dummy; only for 2 pair) | core pair (twisted) triple (twisted) quad (twisted) |
| twisting of elements | reverse layer or reciprocating lay technique ≤ 100mm | reverse layer or reciprocating lay technique ≤ 100mm | reverse layer or reciprocating lay technique ≤ 100mm | reverse layer or reciprocating lay technique ≤ 100mm | lay length clearly defined; depending on conductor size and element; between 100 and 150 mm |
| Individual pair screens |
laminated tape aluminium/PET aluminium thickness ≥ 8 µm PET thickness ≥10 µm (metallic side down, in contact with drain wire + wrapping consisting of one layer tape (50% overlap) or two layers of tape (≥ 23µm) (each 25% overlap).) |
laminated tape aluminium/PET aluminium thickness ≥ 8 µm PET thickness ≥10 µm (metallic side down, in contact with drain wire + wrapping consisting of one layer tape (50% overlap) or two layers of tape (≥ 23µm) (each 25% overlap).) |
laminated tape aluminium/PET aluminium thickness ≥ 8 µm PET thickness ≥10 µm (metallic side down, in contact with drain wire + wrapping consisting of one layer tape (50% overlap) or two layers of tape (≥ 23µm) (each 25% overlap).) |
laminated tape aluminium/PET aluminium thickness ≥ 8 µm PET thickness ≥10 µm(metallic side down, in contact with drain wire + wrapping consisting of one layer tape (50% overlap) or two layers of tape(≥ 23µm) (each 25% overlap).) | laminated tape aluminium/PETtotal thickness 24 µm(metallic side down, in contact with drain wire + wrapping consisting of one layer of plastic tape under and above screen)< |
| drain wire | solid or stranded, tinned annealed copper cross section ≥ 0.5mm² |
solid or stranded, tinned annealed copper cross section ≥ 0.5mm² |
solid or stranded, tinned annealed copper cross section ≥ 0.5mm² |
solid or stranded, tinned annealed copper cross section ≥ 0.5mm² |
solid tinned copper drain wire 0.6mm Ø, under individual screen |
| Colour code: | |||||
| Pairs | COLOR LINK | COLOR LINK | COLOR LINK | COLOR LINK | 300V white and black 500V blue and black |
| Triples | Not defined | Not defined | Not defined | Not defined | 300V white and black and red 500V blue and black and red |
| Quads | Not defined (exception: 2 pair is a 1 quad construction) | Not defined (exception: 2 pair is a 1 quad construction) | Not defined (exception: 2 pair is a 1 quad construction) | Not defined (exception: 2 pair is a 1 quad construction) | 300V white and black and red and grey 500V blue and black and red and grey |
| Remark: | differentiation of the pairs is defined through different colour codes for each pair; alternatively numbered PET foil around pairs | differentiation of the pairs is defined through different colour codes for each pair; alternatively numbered PET foil around pairs | differentiation the pairs is defined through different colour codes for each pair; alternatively numbered PET foil around pairs | differentiation of the pairs is defined through different colour codes for each pair; alternatively numbered PET foil around pairs | 300V cables are continuously numbered on white core; 500 V on blue core |
| Overall screen: | |||||
| Collective screen | laminated aluminium/PET aluminium thickness ≥ 8 m PET thickness ≥10 µm+ drain wire (optional) consisting of solid or stranded, tinned annealed copper cross section ≥ 0.5mm² Wrapping layer of tape under collective screen |
laminated tape aluminium/PET aluminium thickness ≥ 8 µm PET thickness ≥10 µm+ drain wire (optional) consisting of solid or stranded, tinned annealed copper cross section ≥0.5mm² Wrapping layer of tape under collective screen |
laminatedaluminium/PET aluminium thickness ≥ 8m PET thickness ≥10 µm drain wire (optional) consisting of solid or stranded, tinned annealed copper cross section ≥0.5mm² Wrapping layer of tape under collective screen |
laminated tape aluminium/PET aluminium thickness ≥ 8 µm PET thickness ≥10 µm + drain wire (optional) consisting of solid or stranded, tinned annealed copper cross section ≥ 0.5mm² Wrapping layer of tape under collective screen | collective screen (24 µm aluminium/PET) tape + 7 stranded tinned copper drain wire (0.5mm²); overlap of foil min 20%; drain wire in direct contact with metallic side of the foil Wrapping layer of tape under collective screen |
| Metal braid | not defined | not defined | not defined | not defined | tinned copper wires ( C ) wire diameter ≥ 0.3 mm filling factor ≥ 0.57 mm |
| Metallic protection/armouring: | |||||
| round steel wire SWA |
galvanized steel wire armour 0.9, 1.25, 1.6, 2.0' 2.5mm |
galvanized steel wire armour 0.9, 1.25, 1.6, 2.0' 2.5mm |
galvanized steel wire armour 0.9, 1.25, 1.6, 2.0' 2.5mm |
galvanized steel wire armour 0.9, 1.25, 1.6, 2.0' 2.5mm |
SWA Min. thickness of wires 0.9 mm (see next page for details) |
| flat steel wires with counter helix |
not defined | not defined | not defined | not defined | F (flat galvanised steel wire); G (counter helix) Only defined for overall diameter under armour ≥ 15 mm |
| steel or brass tape | not defined | not defined | not defined | not defined | min. thickness of tape; brass: 0.075 mm steel: 0.20 mm offered as double layer steel tape B |
| Metal braid | not defined | not defined | not defined | not defined | galvanised steel wires ( Q ) wire diameter ≥ 0.3 mm filling factor ≥ 0.57 mm |
| Bedding/inner sheath: | |||||
| materials | extruded bedding of type 2C or type 03 black polyethylene compound in accordance with BS 6234（TYPE 2） extruded bedding of type TM1 or type 6 black PVC compound in accordance with BS 6746(TYPE 3) |
extruded bedding of type TM1 black PVC compound in accordance with BS 6746 | extruded bedding of a PE compound conforming to BS EN 50290-2-24:2002, grade LD(TYPE 2) extruded sheath of a PVC compound conforming to BS EN 50290-2-22:2002, grade TM51(TYPE 3) |
extruded sheath of a PVC compound conforming to BS EN 50290-2-22:2002, grade TM51 |
PVC (EN 50290-2-22) Polyethylene (EN 50290-2-24) Halogen free flame retardant compound LSZH (EN 50290-2-27) |
| Outer sheath: | |||||
| material | extruded oversheath of type TM1 PVC compound in accordance with BS 6746 | extruded bedding of type TM1 or type 6 black PVC compound in accordance with BS 6746(TYPE 1) extruded oversheath of type TM1 PVC compound in accordance with BS 6746(TYPE 2) |
extruded sheath of a PVC compound conforming to BS EN 50290-2-22:2002, grade TM51 |
extruded sheath of a PVC compound conforming to BS EN 50290-2-22:2002, grade TM51 |
PVC (EN 50290-2-22) Polyethylene (EN 50290-2-24) Halogen free flame retardant compound LSZH (EN 50290-2-27) |
| thickness | refer standard | refer standard | refer standard | refer standard | Calculated acc. to formular: without metallic protection SRT = 0.04 x D +0.7 (min. 0.8 mm) with metallic protection SRT = 0.028 x D +1.1 (min 1.3 mm) D = Diameter under outer sheath |
| Environmental and other protection: | |||||
| Moisture barriers | not defined | not defined | not defined | not defined | 1) Water swellable tape 2) Water swellable non – toxic powder 3) Filling compound 4) Laminated sheath of a longitudinally overlapped metallic foil (150µm) 5) Combination of 1) – 4) |
| Chemical protection Multilayer sheath (L)2Y4Y (ALNYC) |
not defined | not defined | not defined | not defined | Multilayer sheath Laminated aluminium (Al) foil with an extruded layer of HDPE + layer of Polyamide (PA) Thickness of Al ≥ 15 µm Thickness of PA ≥ 0.3 mm (thickness at any point) |
| Lead sheath: | |||||
| Chemical protection Lead sheath |
Part 1 type 3 cables extruded sheath of lead alloy conforming to BS 801 |
none | Part 1 type 3 cables extruded sheath of lead alloy conforming to BS EN 50307 |
none | M (Lead sheath) complying with EN 50307 can be apllied The thickness is calculated in acc. to the diameter (D) underneath; Formular: LRT = 0.03 x D+0.7mm with a thickness at any point min. ≥ 0.66 mm |
What are EN 50288-7 Cables?
Multi-element metallic cables used in analogue and digital communication and control - Part 7: Sectional specification for instrumentation and control cables (english version) (Austrian Standard)
EN 50288-7 allows for many variations including different voltage & temperature ratings, braid armours, fire barriers and chemical resistant beddings. If you cannot see the type required please call us, we will be able to help.