NSi Industries Astronomic 7-Da...
IN STOCK (leaves warehouse same day if ordered before 3pm ET)
$78.57
NSi Industries Astronomic 7-Day Wall Switch Timer, 15A 120/277V LED Rated

NSi Industries Astronomic 7-Day Wall Switch Timer, 15A 120/277V LED Rated

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Model: SS703Z

In Stock (leaves warehouse same day if ordered before 3pm ET)

$78.57
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NSi Industries Astronomic 7-Day Wall Switch Timer, 15A 120/277V LED Rated

The NSi Industries Astronomic 7-Day Wall Switch Timer is a 3-Way, No Neutral in-wall time switch rated 15A at 120/277 VAC and rated for LED loads. Built as a 7 Day Astronomic In Wall Time Switch with 7 Day Programmable scheduling, it mounts to a standard Single Gang Wall Plate and is cULus listed for reliable, code-compliant control of lighting, fans, motors, and appliances. This SPST switch is designed for installers who need automatic astronomic on/off scheduling without running a neutral conductor.

Key Features

  • No Neutral, 3-Way Wiring: Configured as a No Neutral, 3-Way switch timer rated 15A at 120/277V for straightforward retrofit installation.
  • 7-Day Astronomic Scheduling: Functions as a 7 Day Astronomic In Wall Time Switch with 7 Day Programmable control for automatic dusk-to-dawn and custom timing schedules.
  • LED Rated Performance: Rated 15A at 120/277 VAC and rated for LED loads, supporting modern lighting retrofits.
  • SPST Switch Action: Single Pole Single Throw (SPST) switching for dedicated load control.
  • Single Gang Wall Plate Mounting: Enclosure and mounting configured for a Single Gang Wall Plate for a clean, standard in-wall installation.
  • Wide Operating Temperature Range: Rated for operation from 32 to 104 F, suitable for a range of installation environments.
  • 50-60 Hz Frequency Rating: Compatible with standard 50-60 Hz electrical systems.

Certifications & Compliance

  • cULus Listed

Technical Specifications

  • Refer to manufacturer documentation for complete technical specifications.

Typical Applications

  • Outdoor Security Lighting Control
  • Interior Lighting Scheduling
  • Fan and Motor Switching
  • Appliance Switch Control
  • Commercial and Residential Retrofit Installations

Why NSi Industries?

NSi Industries builds this Astronomic Wall Switch Timer to cULus listing standards, giving electrical professionals a dependable, code-compliant option for automated lighting and load control. With 7 Day Astronomic Programmable scheduling and a 15A 120/277V LED-rated switching platform, it delivers consistent, reliable performance for both commercial and residential switching applications.

Manufacturer Resources

Product Specs

Mounting Method:
Single Gang Wall Plate
Action:
SPST
Standards:
cULus
Product Type:
Time Switch
Operating Temperature:
32 to 104 F
Scheduling:
7 Day Programmable
Voltage Rating:
120/277 VAC
Frequency Rating:
50-60 Hz
Configuration:
Single Gang Wall Plate
Application:
Outdoor Security-Interior Lights- Fans-Motors-Appliance Switch
Listing:
cULus
Department:
Electrical
Product Group:
Wiring Devices
Product Subgroup:
Lighting Controls & Sensors

NSi SS703Z – Frequently Asked Questions

1) Can I install the NSi SS703Z timer switch in a box with no neutral wire?
Yes. The NSi SS703Z astronomic wall switch timer is a no-neutral design, so it works in older switch boxes where only the hot and switch leg are present. That's the main reason installers pick it for retrofits instead of pulling a new conductor back to the panel.
2) Will the SS703Z work on a 277V lighting circuit in a commercial building?
It is rated 120/277 VAC at 15A, so it drops into either a 120V residential circuit or a 277V commercial lighting branch circuit without a different part number. Frequency rating is 50-60 Hz.
3) Can this astronomic timer switch control LED fixtures without flicker issues?
The NSi astronomic wall switch timer is rated for LED loads at 15A, 120/277V, so LED retrofit lighting is a supported load type. It is a switching device, not a dimmer, so it turns the load fully on and off on schedule.
4) Does the NSi SS703Z work in a 3-way circuit with a second switch?
Yes, it is configured for 3-way wiring, so you can keep manual control from a companion switch at the other location while the timer handles the automatic schedule. Switch action itself is SPST.
5) What does astronomic mean on a wall switch timer, and do I need one instead of a plain 7-day timer?
Astronomic means the timer tracks sunrise and sunset through the year and shifts its on/off times with them, so exterior lights follow actual dusk-to-dawn instead of a fixed clock time you keep resetting seasonally. The NSi SS703Z combines that with 7-day programmable scheduling, so you can also set different times by day of week. If the load runs on a fixed clock schedule only, such as an office corridor from 7am to 7pm, a straight programmable timer covers it; the astronomic function earns its place on outdoor and security lighting.
6) Will the NSi SS703Z timer fit a standard single-gang switch box and cover plate?
It mounts to a standard single gang wall plate, so it takes the place of an existing toggle or decorator switch in a one-gang box. No proprietary plate is required.
7) Can this timer switch run a bathroom exhaust fan or a small motor load, or is it lighting only?
Listed applications cover outdoor security lighting, interior lights, fans, motors and appliance switching, all within the 15A 120/277V rating. Size the load to stay under 15 amps.
8) Is the NSi astronomic wall timer suitable for an unheated garage or a cold exterior wall?
Operating range is 32 to 104 F. Below freezing is outside that range, so an unheated space that drops under 32 F is not a good location for it. For outdoor lighting control, mount the switch indoors and let it control the exterior fixtures.
9) Is the NSi SS703Z listed for use on a commercial job that requires UL-recognized devices?
The switch is cULus listed, which covers both US and Canadian requirements for the device itself.
How fast can I get the NSi SS703Z delivered?
Most orders ship the same day from our distribution partners, with quick delivery throughout the continental U.S. Need it urgently? Contact Us for expedited shipping options.
Can I return it if it doesn’t work for me?
Yes—ZenSupply offers a hassle-free return policy. If the product isn’t the right fit, reach out to our support team for a return authorization or setup a return by following our return instructions.
Does the NSi SS703Z come with a warranty?
Absolutely. The NSi SS703Z is backed by a manufacturer’s warranty. For full warranty terms, check the product documentation or Contact Us.
How do I get technical support or installation help for the NSi SS703Z?
You can call, text, or email our expert support team for fast answers. We’re here to help with product selection, installation tips, and troubleshooting. Contact Us
Why buy the NSi SS703Z from ZenSupply?
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