Nsi Industries C515M In-wall Spring Wound Timer 15 Min

Product Description

The NSI INDUSTRIES C515M is a commercial-grade, spring-wound in-wall timer designed for controlling loads that require a fixed time-on cycle without a hold feature. Rated for 20 amps at 125 VAC and 10 amps at 250/277 VAC, this SPDT/SPST switch handles resistive, inductive, and motor loads up to 2 HP at 250 VAC. The 15-minute time cycle is set by a twist knob with no additional adjustments required. No neutral wire is needed, making it a practical choice for retrofit installations in existing switch boxes. Licensed electricians and HVAC technicians are the typical installers.

The C515M is suited for commercial and residential applications where timed shutoff of ventilating fans, HVAC equipment, whirlpool motors, self-storage lighting, and general motor and pump loads is required. The wall-mount form factor fits a standard in-wall electrical box. The brushed aluminum finish is consistent with commercial-grade switch trim. Operating temperature range of 32 to 122 degrees F covers typical indoor mechanical and utility spaces. The absence of a hold feature keeps operation straightforward for facilities where constant-on override is not needed.

Key Features

• 15-minute spring-wound time cycle with variable twist-knob setting
• SPDT and SPST switching — no neutral wire required, retrofit-friendly
• 20 amp rating at 125 VAC for resistive and inductive loads
• Motor load rating up to 1 HP at 125 VAC and 2 HP at 250 VAC
• UL listed for both Canada and the US
• Metal brushed aluminum finish for commercial wall-mount applications

Compatibility

Designed as an OEM-style commercial in-wall spring-wound timer suitable for ventilating fans, HVAC equipment, whirlpools, self-storage systems, motors, and pumps in standard wall-mount electrical enclosures.

Installation Notes

Installation should be performed by a licensed electrician in accordance with NEC requirements. De-energize the circuit at the breaker and verify absence of voltage before wiring. No neutral conductor is required, simplifying connections in two-wire switch loops. Confirm the connected load does not exceed the contact current and horsepower ratings before energizing.

Technical Specifications

• Type: Commercial
• Time Cycle: 15 minutes
• Operation Type: Without Hold
• Switch Type: SPDT, SPST
• Contact Current Rating: 20 amps at 125 VAC 50/60 Hz (Resistive/Inductive), 10 amps at 250/277 VAC 50/60 Hz (Resistive/Inductive), 7 amps at 125 VAC 50/60 Hz (Tungsten)
• Contact Power Rating: 1 HP at 125 VAC, 2 HP at 250 VAC (Motor)
• Operating Temperature: 32 to 122 degrees F
• Mounting: Wall
• Color/Finish: Metal Brushed Aluminum
• Application: Ventilating Fans, HVAC, Whirlpools, Self Storage, Motors and Pumps
• Approvals: UL (Canada and US)
• Height: 2.685 inches
• Width: 1.725 inches
• Length: 1.231 inches
• Package Weight: 0.4 pounds
• Country of Origin: China

Standard Information

• Brand: NSI INDUSTRIES
• Manufacturer Part Number: C515M