Subpanel

Related terms

• Feeder

  The conductors carrying power from the main panel to a subpanel or large appliance disconnect.

• T&P Relief Valve

  The temperature-and-pressure safety valve on a water heater that prevents tank rupture. Must discharge per code; never plugged.

• Static Pressure

  Resistance to airflow in the duct system. High static (undersized ducts, dirty filter) overworks the blower and cuts capacity.

• Tamper-Resistant Receptacle

  An outlet with internal shutters preventing object insertion, code-required in dwelling living spaces.

• Soil Stack

  The main vertical drain carrying waste from toilets and fixtures down to the building drain.

• Tank Water Heater

  A storage water heater keeping a tank hot. Lowest upfront cost; standby losses and limited capacity are the trade-offs.

• Smoke & CO Alarm Requirements

  Code rules for interconnected smoke and carbon-monoxide alarms that a remodel of a sleeping area or fuel appliance typically triggers.

• Tankless Water Heater

  An on-demand heater with endless hot water and no standby loss. Higher install cost; gas units often need larger gas/vent lines.