Insulation that can be seen to have failed also will likely have failedwhere wiring is concealed.
The oldest types of residential wiring systems are seldom encountered today.
Once the service ampacity has been determined, compare it to the estimatedampacity the building will require after rehabilitation.
If the estimatedampacity exceeds the existing ampacity, the building's electrical service willneed upgrading.
CTA In unaltered buildings built since about 1940, the electrical system islikely to be intact and safe, although it may not provide the capacity requiredfor the planned reuse of the building.
Electrical capacity can be easilyincreased by bringing additional capacity in from the street and adding a largerpanel board between the service entry and the existing panel.