HS is the code for which description?

• A. Home control stick relay
• B. Cable
• C. Indicator light
• D. Caution signal light control

Answer: (A)

The key idea here is that codes like HS are used to identify specific equipment in the signaling system. HS is the designation for the Home control stick relay, a relay device that handles the control wiring and interlocking logic needed to operate the home signal. This relay is a active component in the circuit that changes state to clear or display the home signal as part of routing and safe operation. It isn’t just a passive item like a cable or a simple indicator light, and it isn’t a separate control element for caution signals, which would have different codes. So when you see HS, you look for the home control stick relay—the device that directly controls the home signal function in the interlocking scheme.