relay-box

A technician opens the relay-box to inspect the electrical connections.

Definition

1. Noun:
   • Electrical housing: A "relay-box" is a container or enclosure that houses one or more electrical relays, used to control circuits by opening or closing contacts in response to a signal.

Usage Examples

• Noun:
  • The technician installed a new relay-box to manage the power supply to the factory machines. (The enclosure containing relays that controls electrical circuits.)
  • We need to check the relay-box in the basement to see if it has tripped. (The housing unit for electrical relays.)

Advanced Usage

• "to wire a relay-box": to connect electrical wires to the terminals inside the relay-box.

  • The electrician spent an hour wiring the relay-box for the lighting system. (Connecting the internal components of the relay-box to the electrical system.)

• "relay-box malfunction": a failure or fault in the relay-box that disrupts its function.

  • A relay-box malfunction caused the traffic lights to stop working. (A defect in the housing or its internal relays.)

Variants and Related Words

• Relay (n): an electrical device that uses a small current to control a larger current.

  • The relay in the relay-box activates the motor. (The core component inside the relay-box.)

• Box (n): a container or enclosure.

  • The relay-box is made of metal to protect the internal components. (The physical casing.)

Synonyms

• Control box: an enclosure for electrical control components.
• Switchgear enclosure: a housing for switching and control devices (more industrial term).

Related Idioms