Earthing Straps

Earthing straps, or grounding straps, connect an electrical system to the conductive surface of the earth for safety. They provide an outlet for excess current if there is a fault in the system, allowing the current to flow into the earth. 


Earthing straps are also commonly used as antistatic devices. When someone is working on sensitive electrical equipment, they might need to prevent build up of static, which could cause sparks to fly and damage equipment.


How do earthing straps provide security?

In the event of a fault, earthing straps provide protection by drawing current away from the equipment or worker and into the ground. If the current gets too high, the circuit should also be protected by a device such as a thermal magnetic circuit breaker.


Types of earthing straps

There are broadly two types of earthing straps: those that are for use on humans, and those that are for use directly on equipment.


Antistatic earthing straps fit around your wrist, and connect via a clamp to a ground conductor. Equipment earthing straps similarly encircle equipment, and are connected to a ground conductor via an earthing wire.


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Description Price Material Minimum Wire CSA Maximum Wire CSA Minimum Diameter Maximum Diameter Diameter Range Wire CSA Range
RS Stock No. 170-1978
Mfr. Part No.06190004000
HK$390.30
1 Bag of 15
Bag(s)
Tinned Bronze 2.5mm² 10mm² 16mm 88mm 16 → 88mm 2.5 → 10mm²
RS Stock No. 236-5264
Mfr. Part No.06190007000
HK$391.02
1 Bag of 20
Bag(s)
Tinned Bronze 2.5mm² 6mm² 8mm 28mm 8 → 28mm 2.5 → 6mm²
RS Stock No. 390-2448
BrandRS PRO
HK$10.553
Each (In a Pack of 10)
units
Metal - 10mm² 12mm 32mm 12 → 32mm -
RS Stock No. 426-3126
BrandRS PRO
HK$11.422
Each (In a Pack of 10)
units
Metal 2.5mm² 6mm² - - - 2.5 → 6mm²
RS Stock No. 752-7757
Mfr. Part No.0 343 86
BrandLegrand
HK$28.832
Each (In a Pack of 10)
units
Polyamide 2.5mm² 10mm² 18mm 22mm 18 → 22mm -
RS Stock No. 426-3132
BrandRS PRO
HK$32.986
Each (In a Pack of 5)
units
Brass 3mm² 35mm² - - - 3 → 35mm²
RS Stock No. 752-7754
Mfr. Part No.0 343 85
BrandLegrand
HK$24.142
Each (In a Pack of 20)
units
Polyamide 2.5mm² 10mm² 12mm 16mm 12 → 16mm -
RS Stock No. 170-1962
Mfr. Part No.06190003000
HK$353.40
1 Bag of 16
Bag(s)
Tinned Bronze 2.5mm² 10mm² 16mm 48mm 16 → 48mm 2.5 → 10mm²
RS Stock No. 491-822
Mfr. Part No.9933
HK$101.86
Each
units
Brass - - - 20mm - -
RS Stock No. 426-3148
BrandRS PRO
HK$35.28
Each
units
- - - - - - -
RS Stock No. 153-3714
Mfr. Part No.7000675
BrandRittal
HK$299.34
1 Kit
Kit(s)
- - 4mm² - - - Maximum of 4mm²
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