Earth Tags

CMP slip on Earth Tags, installed between the cable gland and equipment, provide an earth bond connection as specified in BS6121:Part 5:1993 and also complies with category "B" rating specified in EN 50262:1999.

This table details fault current ratings relating to CMP Brass Earth Tags:

CMP Earth Tag Size Short Circuit Ratings Symmetrical Fault Current (kA) for 1 second
20 3.10
25 4.00
32 5.40
40 7.20
50 10.40
63 10.40
75 10.40
Note: Alternative materials are also available. Please refer to Table "E" of the Ordering References page detailed below. e.g. 20ET4 for M20 Stainless Steel Earth Tag, 050NPTET4 for 1/2" NPT Stainless Steel Earth Tag.

Metric Earth Tags

Ordering Reference (Brass) Reference Cable Entry Size Minimum Thickness Nominal Collar Diameter Earth Link Connection Hole Size Nominal Length Nominal Centres
16ET M16 1.3 25.4 M6 49.3 30.2
20ET M20 1.3 27.1 M6 53.4 33.1
25ET M25 1.5 35.1 M6 59.4 35.6
32ET M32 1.5 45.2 M12 77.0 43.1
40ET M40 1.5 53.7 M13 88.7 45.4
50ET M50 1.5 65.2 M13 111.1 58.1
63ET M63 1.5 82.6 M13 128.6 66.8
75ET M75 1.5 95.4 M13 141.1 73.0
90ET M90 1.5 114.0 M13 161.0 85.0
100ET M100 1.5 125.0 M13 190.0 103.0
150ET M115 1.5 140.4 M13 210.0 117.8
Dimensions are displayed in millimetres unless otherwise stated


NPT Earth Tags

Ordering Reference (Brass) Reference Diameter "A" Minimum Thickness Nominal Diameter "C" Hole Size "D" Nominal Length "E" Nominal Centres "F"
050NPTET 1/2" NPT 0.051 1.067 M6 2.102 1.303
075NPTET 3/4" NPT 0.051 1.382 M6 2.339 1.402
100NPTET 1" NPT 0.051 1.780 M12 3.031 1.697
125NPTET 1-1/4" NPT 0.051 2.114 M13 3.492 1.787
150NPTET 1-1/2" NPT 0.051 2.567 M13 4.374 2.287
200NPTET 2" NPT 0.051 3.252 M13 5.063 2.630
250NPTET 2-1/2" NPT 0.051 3.756 M13 5.555 2.874
300NPTET 3" NPT 0.051 4.496 M13 6.339 3.346
350NPTET 3-1/2" NPT 0.051 4.961 M13 7.638 4.646
All dimensions are in inches unless otherwise stated


Additional information

CMP WP Earth Tags_0310 Issue 1