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Building
regulations
The Approved Documents L2A and L2B
provide guidance to the technical requirements
of the Building Regulations in respect to the
conservation of fuel and power.
While they only affect England and Wales, the principle is still
useful for the rest of the UK.
Part of these approved documents is to provide the owner with
relevant energy meters so that at least 90% of the annual energy
consumption can be traced to end use categories – such as
heating, lighting or power.
To help achieve this, you should install an incoming meter for
every building that has a floor area greater than 500m
2
.
In addition, CIBSE TM 39 recommends sub meters should be
provided for a final electrical distribution board that has an input
power greater than 50kW.