Our Voltimum Experts answer your questions on a daily basis in our Technical Expertise area. This Question of the Day concerns BS 7671 – ‘Diversity’ in terms of air-conditioning units. It is answered by SELECT:

Answer: The information in Table 1B can be used for guidance. However the OSG makes clear that it is impossible to specify the appropriate allowance for diversity for every type of installation and equipment, and that this may require specialist knowledge and experience to determine. Table 1B can therefore be increased or decreased as seen fit by the engineer responsible for the installation design.
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