Cable Ladder Standards

Metsec Cable Ladder Systems generally conform to BS EN 61537:2007 Cable management - cable tray systems and cable ladder systems

Information relating to compliance is detailed/highlighted within the following sections of the standard:

  • 6 Classification

    6.1 According to material

    6.1.1 Metsec cable ladder systems are metallic system components

    6.2 According to resistance to flame propagation

    6.6.2 Metsec cable ladder systems are non - flame propagating system components

    6.3 According to electrical continuity characteristics

    6.3.2 Metsec cable ladder systems have electrical continuity characteristics

    6.4 According to electrical conductivity

    6.4.1 Metsec cable ladder systems are electrically conductive system components

    6.5 According to resistance against corrosion

    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.)

    Table 1 - classification for resistance against corrosion

    Class Reference - material and finish
    0 (a) None
    1 Electroplated to a minimum thickness of 5 μm
    2 Electroplated to a minimum thickness of 12 μm
    3 Pre - galvanised to grade 275 to EN 10327 and EN 10326
    4 Pre - galvanised to grade 350 to EN 10327 and EN 10326
    5 Post - galvanised to a zinc mean coating thickness (minimum) of 45 μm according to ISO 1461 for zinc thickness only
    6 Post - galvanised to a zinc mean coating thickness (minimum) of 55 μm according to ISO 1461 for zinc thickness only
    7 Post - galvanised to a zinc mean coating thickness (minimum) of 70 μm according to ISO 1461 for zinc thickness only
    8 Post - galvanised to a zinc mean coating thickness (minimum) of 85 μm according to 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

    Table 7 - System component compliance and classification for resistance against corrosion

    System Component Material and Finishes Classification According To Compliance Subclause for Compliance Check
    Non-metallic 6.5.1 Declaration 14.2.1
    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

    Table 8 - Zinc coating thickness of reference materials

    Class Minimum Thickness μm Minimum coating thickness as given in EN 10327 or EN 10326 μm Mean coating thickness (minimum) to ISO 1461 μm
    0 (a) - - -
    1 5 - -
    2 12 - -
    3 - 15 -
    4 - 19 -
    5 - - 45
    6 - - 55
    7 - - 70
    8 - - 85

    (a) As declared by the manufacturer or responsible vendor

    6.6 According to temperature

    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.

    Table 2 - Minimum temperature classification

    Minimum transport, storage installation and application temperature °C
    +5
    -5
    -15
    -20
    -40
    -50

    Table 3 - Maximum temperature classification

    Maximum transport, storage installation and application temperature °C
    +40
    +60
    +90
    +105
    +120
    +150

    6.8 According to the free base area of the cable ladder length as given in Table 5.

    Table 5 - Free base area classification

    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 According to impact resistance

    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 Marking and documentation

    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

  • 8 Dimensions

    Key cross sectional dimensions for straight cable ladders

    Part No. External Depth mm Internal Depth mm External Width mm Internal Width mm X-sectional area mm2
    LSL050/0150# 50 31.0 192 150 4650
    LSL050/0300# 50 31.0 342 300 9300
    LSL050/0450# 50 31.0 492 450 13950
    LSL100/0150# 100 70.0 192 150 10500
    LSL100/0300# 100 70.0 342 300 21000
    LSL100/0450# 100 70.0 492 450 31500
    LSL100/0600# 100 70.0 642 600 42000
    LSL100/0750# 100 70.0 792 750 52500
    LSL100/0900# 100 70.0 942 900 63000
    LSL125/0150# 125 95.0 192 150 14250
    LSL125/0300# 125 95.0 342 300 28500
    LSL125/0450# 125 95.0 492 450 42750
    LSL125/0600# 125 95.0 642 600 57000
    LSL125/0750# 125 95.0 792 750 71250
    LSL125/0900# 125 95.0 942 900 85500
    LSL150/0150# 150 120.0 192 150 18000
    LSL150/0300# 150 120.0 342 300 36000
    LSL150/0450# 150 120.0 492 450 54000
    LSL150/0600# 150 120.0 642 600 72000
    LSL150/0750# 150 120.0 792 750 90000
    LSL150/0900# 150 120.0 942 900 108000

    Minimum internal radius of fittings

    Minimal internal radius of fittings available for the accommodation of cables is 300 mm.

  • 9 Construction

    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.

  • 10 Mechanical properties

    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.