Limit controls are generally wired into the circuit in _____.

Limit controls are safety devices designed to prevent equipment from exceeding predetermined operating conditions. They are typically wired into the circuit in series with the operating components, which ensures that any interruption or change in the status of the limit control directly affects the operation of the entire system.

When limit controls are wired in series, they act as a safeguard that disconnects the controlling component (like a motor or heating element) when a limit is reached, such as a maximum temperature or pressure. This series configuration ensures that the circuit is complete only when all conditions are within safe limits. If a limit condition is triggered, the series circuit is broken, effectively shutting down the equipment to prevent damage or unsafe operating conditions.

In contrast, parallel wiring would allow the main component to continue operating even if a limit control is triggered, which could lead to unsafe conditions. Thus, wiring limit controls in series is crucial for safety and operational integrity in HVAC systems.