they stopped using aluminum wiring in ontario in mid-1970s.
when did they stop using aluminum wiring in ontario?
mid-1970s
the use of older solid aluminum wiring in residential construction has resulted in failures of connections at electrical devices, has been implicated in house fires according to the u.s. consumer product safety commission (cpsc), and in some areas it may be difficult to obtain homeowners insurance for a house with older aluminum wiring. there are several possible reasons why these connections failed. the two main reasons were improper installations (poor workmanship) and the differences in the coefficient of expansion between aluminum wire used in the 1960s to mid-1970s and the terminations, particularly when the termination was a steel screw on an electrical device. the reported hazards are associated with older solid aluminum branch circuit wiring (smaller than no. 8 awg)
aluminum building wiring
the larger size stranded aluminum wires don't have the same historical problems as solid aluminum wires, and the common terminations for larger size wires are dual-rated terminations called lugs. these lugs are typically made with a coated aluminum alloy, which can accommodate either an aluminum wire or a copper wire. larger stranded aluminum wiring with proper terminations is generally considered safe, since long-term installations have proven its reliability.





























section::::problems with aluminum wiring.
aluminum building wiring