Illinois Society of Architects · Chicago · leaf 408
h can be used interchangeablyto a large extent, have been standardizedand they are now obtainable from a numberof different manufactures. They comprisein the 30-ampere size. (a) A combination fused service-switchand connection-block for single installations. (b) A fused connection-block and…
Architecture · Building · Architects
Internet Archive · University of Illinois Urbana-Champaign · Public Domain Mark 1.0. Free to use for anything.
