Cable Tray Standards

Metsec Cable Tray 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 tray systems are metallic system components

    6.2 According to resistance to flame propagation

    6.2.2 Metsec cable tray systems are non-flame propagating system components

    6.3 According to electrical continuity characteristics

    6.3.2 Metsec cable tray systems have electrical continuity characteristics

    6.4 According to electrical conductivity

    6.4.1 Metsec cable tray systems are electrically conductive system components

    6.5 According to resistance against corrosion

    6.5.2 Metsec cable tray 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

    6.7 According to the free base area of the cable tray length as given in Table 4.

    Table 4 - Perforation base classification

    Classification Perforation in the base area
    A Up to 2%
    B Over 2% and up to 15%
    C Over 15% and up to 30%
    D More than 30%

    Note: Classification D relates to IEC 60364 - 5 - 52 Subclause A.52.6.2 second paragraph

    6.9 According to impact resistance

    6.9.4 System component offering impact resistance up to 20 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 trays

    Part No. External Depth mm Internal Depth mm External Width mm Internal Width mm (internal) X-sectional Area mm2
    CTSL12/0050# 12 11.1 50 48.2 535
    CTSL12/0075# 12 11.1 75 73.2 813
    CTSL12/0100# 12 11.1 100 98.2 1090
    CTSL12/0150# 12 11.1 150 148.2 1645
    CTSL12/0225# 12 11.1 225 223.2 2478
    CTSL18/0300# 18 16.8 300 297.6 5000
    CTSL25/0050# 25 24.3 50 48.6 1181
    CTSL25/0075# 25 24.3 75 73.6 1788
    CTSL25/0100# 25 24.3 100 98.6 2396
    CTSL25/0150# 25 24.1 150 148.2 3572
    CTSL25/0225# 25 24.1 225 223.2 5379
    CTSL25/0300# 25 24.0 300 298.0 7152
    CTSL25/0450# 25 23.8 450 447.6 10653
    CTSL25/0600# 25 23.8 600 597.6 14223
    CTSL50/0075# 50 49.2 75 73.4 3611
    CTSL50/0100# 50 49.2 100 98.4 4841
    CTSL50/0150# 50 49.1 150 148.2 7277
    CTSL50/0225# 50 48.8 225 222.6 10863
    CTSL50/0300# 50 48.8 300 297.6 14523
    CTSL50/0450# 50 48.5 450 447.0 21680
    CTSL50/0600# 50 48.5 600 597.0 28955
    CTSL50/0750# 50 48.0 750 746.0 35808
    CTSL50/0900# 50 48.0 900 896.0 43008

    Minimum internal radius of fittings

    Minimal internal radius of fittings available for the accommodation of cables is 125mm.

  • 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 tray systems are usually assembled using M6 roofing bolts particularly for couplers, fishplates and connection to supporting framework. These bolts should be tightened to a torque of 12N/m.

  • 10 Mechanical properties

    Cable tray 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 trays 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.