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If main equipotential bonding to gas and water supply on a TNC or TNC-S system is less than 10mm does it need to be upgraded? For example if existing bonding is 4mm does this need to be upgraded, at additional decorating cost to the customer, or is there a way around it? Mat

Due to Part P sockets in a kitchen need 30ma protection, at least half of all jobs I go to appear to have old 3036 rewirable fuses. What is the best way around this issue, preferably ones which do not involve changing the entire consumer unit?