Minneapolis Electrical Joint history

In 1945 it was requested by the contractors to look at a day school format due to all the overtime that was being worked at the time.

In 1946 day school classes started and apprentices are paid half a day’s wages for attending classes.

Plastic NMC began replacing both rubber wire insulation and fabric-based wire insulation in the United States in the 1950's.

In 1956 a Joint Industry Board was established to promote educational and promotional programs to benefit both the IBEW and NECA.

The braided fabric wire insulation was found on a 1960's fluorescent light ballast, while the plastic wire was used in the branch circuit wiring for the light where that ballast was employed.

On December 19, 1968 the Minneapolis Electrical Workers Employee and Apprenticeship Training Fund was established.

The damaged power cable shown above was used with a 1970's electric welder.

A 1980 US CPSC study found that aging electrical systems are a factor in the occurrence of electrical fires in homes, an observation confirmed separately by Aronstein in explaining aluminum wiring hazards in what Aronstein calls the "bathtub curve" that maps failure rates over time.

Aronstein, J. "AC and DC electromigration in aluminum." In Electrical Contacts, 1996.

In June of 2002, the JATC moved to a new 40,000 square foot training center in St Michael, a growing suburb of Minneapolis.

Aronstein, J. "An updated view of the aluminum contact interface." In Electrical Contacts, 2004.

These papers on this subject can be downloaded for free.http://www.nfpa.org/research/fire-protection-research-foundation/projects-reports-and-proceedings/proceedings/2006-proceedings/aged-electrical-systems-symposium

In REDUCE THE AL WIRE RISK: DETAILS, as well as in Aronstein (2011), Aronstein describes plated-copper wire as: