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BSI BS 3456-2.22: AMD 1664: February 1975; AMD 2137: October 1976; AMD 5215: March 1987; AMD 6226: February 28, 1990

Publication Date: Sep 8, 1972
SDO: BSI: British Standards Institution
 DOD Adopted   ANSI Approved Approved

Heaters having a rated input up to and including 18 kW and for use on single-phase or 3-phase supplies.

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