Earthing And Bonding

ETS will subject the installation to a thorough inspection and test under the trained eye.

We start at the source of the installation which will always be the transformer (substation) where relevant and/or the main MCC room. From there the following steps will be taken in order to provide traceability. 

• Ascertain ground earth resistance of transformers without disconnecting earth conductors or neutralising conductor.
• Verify continuity from transformer to MCC main earthing terminal. 
• Undertake a continuity resistance test from the main MCC earth bar to one earth bar in each building/location (these may be located in panels). 
• Undertake a continuity resistance test from the local earth bars to all other earth bars in all locations. 
• Confirm the names, numbers and position of the relevant earth bars etc. on existing plotted drawings and pencil in where necessary. 
• Test and verify bonding to all equipment, services, structure, electrical panels and extraneous conductive material. Depending on the facility this may involve the bonding to vessels, tanks, reactors, cooling towers etc. 
• Undertake visual inspection on above items e.g. cable size, compliance with standards etc. 
• Tests to confirm compliance with ETCI ET101:2008 rules and company specifications. 
• Procedures will vary when testing in potentially explosive atmospheres (ATEX). 

 
A comprehensive report shall be made available with all readings, measurements and observations documented.

For further information contact 087 252 6197 or 090 645 7286

Bonding is necessary to ensure that all metal parts are kept at the same potential i.e. as near to zero potential as possible to eliminate touch voltage.
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