Fundamentals of Aluminum Conductors, Part 2: Installation and Maintenance

The increased use of aluminum conductors in the 1960s and 1970s led to millions of dollars in electrical breakdown claims for Hartford Steam Boiler and many millions more in fire losses for property insurers. These claims were primarily the result of failures of aluminum connectors or connections. But, the proper preparation and installation of aluminum conductors can reduce or even eliminate this type of failure.

HSB Recommended Practice

Hartford Steam Boiler Recommended Practice for branch circuits with the "old" aluminum wiring (circuits installed between 1965 and 1972) is the following:

· The best solution is to discontinue the use of the circuit with aluminum wire, and replace the aluminum wiring.

· Since replacing the aluminum wiring may not be economically feasible, a second-best alternative is installing "pigtails" (a short copper connecting wire) between the aluminum wire and the wired device (receptacle, switch, fixture or breaker). The pigtail connection must be made using either the COPALUM crimp connector, or the King Innovation® AlumiConn® connector.

Read the Full Story for more information about aluminum connections, current wiring practice and the connection process.

Conclusion

A sound, reliability based maintenance program incorporates operating history, operational characteristics and environmental conditions. The same principles apply for a system containing aluminum conductors. The use of aluminum conductors does not require any unique inspections or an increased frequency of inspections.

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