Information relating to compliance is detailed/highlighted within the following sections of the standard:
6.1.1 Metsec cable ladder systems are metallic system components
6.6.2 Metsec cable ladder systems are non – flame propagating system components
6.3.2 Metsec cable ladder systems have electrical continuity characteristics
6.4.1 Metsec cable ladder systems are electrically conductive system components
6.5.2 Metsec cable ladder systems are made of steel with metallic finishes or stainless steel
(Resistance to corrosion is classified according to Table 1. and follow the relevant specification in Table 8, with compliance according to Table 7.)
|Class||Reference – material and finish|
|1||Electroplated to a minimum thickness of 5 m|
|2||Electroplated to a minimum thickness of 12 m|
|3||Pre – galvanised to grade 275 to BS EN 10346|
|4||Pre – galvanised to grade 350 to BS EN 10346|
|5||Post – galvanised to a zinc mean coating thickness (minimum) of 45 ?m according to BS EN ISO 1461 for zinc thickness only|
|6||Post – galvanised to a zinc mean coating thickness (minimum) of 55 ?m according to BS EN ISO 1461 for zinc thickness only|
|7||Post – galvanised to a zinc mean coating thickness (minimum) of 70 ?m according to BS EN ISO 1461 for zinc thickness only|
|8||Post – galvanised to a zinc mean coating thickness (minimum) of 85 ?m according to BS EN ISO 1461 for zinc thickness only|
|9A||Stainless steel manufactured to ASTM: A 240/A 240M – 95a designation S30400 or EN 10088 grade 1 – 4301 without a post treatment (b)|
|9B||Stainless steel manufactured to ASTM: A 240/A 240M – 95a designation S31603 or EN 10088 grade 1 – 4404 without a post treatment (b)|
|9C||Stainless steel manufactured to ASTM: A 240/A 240M – 95a designation S30400 or EN 10088 grade 1 – 4301 with a post treatment (b)|
|9D||Stainless steel manufactured to ASTM: A 240/A 240M – 95a designation S31603 or EN 10088 grade 1 – 4404 with a post treatment (b)|
|(a)||For materials which have no declared corrosion resistance classification|
|(b)||The post – treatment process is used to improve the protection against crevice crack corrosion and the contamination by other steels|
|System Component Material and Finishes||Classification According To||Compliance||Subclause for Compliance Check|
|Reference – zinc coating as in Table 1.||6.5.2 Table 1 classes 1 to 8||Declaration or measurement||14.2.2|
|Non-referenced zinc coating||6.52 Table 1 classes 1 to 8||By neutral salt spray test NSS||14.2.3|
|Reference – stainless steel as in Table 1.||6.5.2 Table 1 Class 9A to 9D||Declaration||14.2.2|
|Non-referenced stainless steel||Not classified||Declaration||None|
|Other metallic coatings||6.5.2 Table 1 Column 1 classes 1 to 8||By neutral salt spray test NSS||14.2.3|
|Aluminium alloys or other metals||6.5.3 Under consideration||Under consideration||14.2.4|
|Organic coatings||6.5.4 Under consideration||Under consideration||14.2.5|
|Class||Minimum Thickness m||Minimum coating thickness as given in EN 10327 or EN 10326 m||Mean coating thickness (minimum) to BS EN ISO 1461 m|
(a) As declared by the manufacturer or responsible vendor
6.6.1 Minimum temperature for the system components is given in Table 2.
6.6.2 Maximum temperature for the system components is given in Table 3.
|Minimum transport, storage installation and application temperature °C|
|Maximum transport, storage installation and application temperature °C|
|Classification||Perforation in the free base area|
|X||Up to 80%|
|Y||Over 80% and up to 90%|
|Z||More than 90%|
Note Classification Z relates to IEC 60364 – 5 – 52 Subclause A.52.6.2 third paragraph
6.9.5 System component offering impact resistance up to 50 J (as verified by testing in accordance with 10.9 Test for impact resistance.)
7.1 Each system component is marked by a label. Labels used fully comply with the rubbing test. Boxed items are labelled on the packaging
|Part No.||External Depth mm||Internal Depth mm||External Width mm||Internal Width mm||X-sectional area mm2|
Minimal internal radius of fittings available for the accommodation of cables is 300 mm.
9.1 Surfaces of system components which are likely to come into contact with cables during installation are inspected to ensure they shall not cause damage to the cables when installed correctly.
9.2 As with all metallic system components, care should be exercised that handling is in accordance with the relative COSHH regulations and gloves should be worn.
9.3 Screwed connections have been designed to withstand the mechanical stresses occurring during installations and normal use and will not cause damage to cables when correctly inserted. Screwed connections are in general ISO metric threads fully compliant to tests in accordance with 9.3.1 and 9.3.2 of the standard. Metsec Cable Ladder Systems are usually assembled using M10 cup square bolts and hex nuts with lock washers for couplers etc tightened to a torque of 45N/m. Other connections require M10 hex bolts for clamps etc tightened to a torque of 25N/m.
Cable ladder lengths have been tested generally in accordance with the standard under 10.2 and 10.3 for verification of the loading graphs. It should be noted that independent testing has been carried out to verify the structural performance of the cable ladders at the minimum and maximum temperature classifications for test conditions under 10.2.2. All accessories eg bends, tees etc should be directly supported by a suitable support device or devices at appropriate positions.