307 / | HD | ELECTRICAL TRANSMISSION OR INTERCONNECTION SYSTEMS |
11 | PLURAL LOAD CIRCUIT SYSTEMS {8} | |
12 | DF | .~> Common conductor or return type {3} |
17 | DF | .~> Transformer connections |
18 | DF | .~> Plural sources of supply {5} |
30 | DF | .~> Anticoupling of load circuits through same source |
31 | DF | .~> Control of current or power {3} |
36 | DF | .~> Serially connected load circuits {1} |
38 | DF | .~> Selectively connected or controlled load circuits {3} |
42 | DF | .~> Circuit arrangements or layouts |