What matters for consumer unit upgrades on a 1930s semi is the condition of this installation, not the average condition of installations generally. Materials and methods we spec on 1930s bay-fronted semi work: 18th Edition metal-clad CU; RCBO per circuit; additional CU for a loft or garage sub-main where the main board is short of ways. Where an installation has been extended over decades, the sensible approach is to establish a baseline before adding anything else to it. It rarely changes the price, but it does change the plan.
If the property is tenanted, the visit is arranged around access rather than around us, which usually means confirming times with whoever holds the keys. We would say the same to a family member. Whether this is urgent or simply overdue, the sequence for consumer unit upgrades on a 1930s semi does not change much.



