What code is used for the description 'Home control relay'?

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Multiple Choice

What code is used for the description 'Home control relay'?

Explanation:
In this coding system, descriptions are matched to short, run-together codes used in the signaling manuals. For a description like “Home control relay,” the standard entry is the single-letter code H. That direct mapping makes it the correct match because it specifically represents the home-control relay category in the codebook. The other codes correspond to different device descriptions within the same system, so they do not fit this description.

In this coding system, descriptions are matched to short, run-together codes used in the signaling manuals. For a description like “Home control relay,” the standard entry is the single-letter code H. That direct mapping makes it the correct match because it specifically represents the home-control relay category in the codebook. The other codes correspond to different device descriptions within the same system, so they do not fit this description.

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