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Technical Guidance Document #039
Please refer to new document #61 that provides updates on this document
The purpose of this document is to provide guidance to ceda members’ service managers on how to comply with the requirements of TB118 without having to train and equip engineers for measuring earth loop impedance.
Prepared October 2021 / Replaced by new document #61 May 2024
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Guidance Document No 39 - The Safe Electrical Isolation of Gas Appliances
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