Metsec

Metsec Cable Tray Systems generally conform to BS EN 61537 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 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 toBS 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

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 ?m Minimum coating thickness as given in EN 10327 or EN 10326 ?m Mean coating thickness (minimum) to ISO 1461 ?m
0 (a)
1 5
2 12
3 13
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 10.2 50 48.2 491.6
CTSL12/0075 12 10.2 75 73.2 746.6
CTSL12/0100 12 10.2 100 98.2 1001.6
CTSL12/0150 12 10.2 150 148.2 1511.6
CTSL12/0225 12 10.2 225 223.2 2276.6
CTSL18/0300 18 10.2 300 297.6 3035.5
CTSL25/0050 25 15.6 50 48.2 751.9
CTSL25/0075 25 23.2 75 73.2 1698.2
CTSL25/0100 25 23.2 100 98.2 2278.2
CTSL25/0150 25 23.2 150 148.2 3438.2
CTSL25/0225 25 23.2 225 223.2 5178.2
CTSL25/0300 25 23.2 300 298.0 6913.6
CTSL25/0450 25 23.0 450 447.6 10294.8
CTSL25/0600 25 22.6 600 597.6 13505.8
CTSL50/0075 50 22.6 75 73.2 1654.3
CTSL50/0100 50 48.2 100 98.2 4733.2
CTSL50/0150 50 48.2 150 148.2 7143.2
CTSL50/0225 50 48.2 225 222.6 10729.3
CTSL50/0300 50 47.6 300 297.6 14165.8
CTSL50/0450 50 47.6 450 447.0 21277.2
CTSL50/0600 50 47.0 600 597.0 28059.0
CTSL50/0750 50 47.0 750 746.0 35062.0
CTSL50/0900 50 46.0 900 896.0 41216.0

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.