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Internet # 100190295

Model # L221N

Store SKU # 1005527225

30 Amp 240-Volt 2-Pole Fused Indoor Light Duty Safety Switch for H or J Fuse Types

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  • Square D indoor light duty safety switch with 30 Amps max
  • 240 volt 2-pole fusible safety switch for H or J fuse types
  • NEMA 1 configuration, surface mount
  • View More Details
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Product Details

About This Product

The Square D by Schneider Electric 30 Amp 240-Volt 2 Pole Indoor Fusible Light Duty Safety Switch is designed for residential and agricultural applications in disconnecting power to workshops, hobby rooms, furnaces and garages. The switch is UL listed, File E2875, and meet or exceed the NEMA Standard KS1. For more than 100 years the Square D brand safety switch has been the unchallenged leader in the market. We've continued our tradition of innovation, developing new features that provide an unsurpassed level of performance, reliability, safety and ease of installation. This tradition has resulted in the Square D brand being preferred two to one over our closest competitor.


  • Learn about general NEC 2020 updates. Contact your local building inspector for adoptions and details.
  • This Safety Switch is compatible with Square D transformers, panelboards, load centers, lighting, contactors, I-Line and residential QO or Homeline circuit breakers, NQ & NF panels
  • 3-wire design with 2 blades and fuse holders and 1 neutral
  • 120/240-Volt, indoor use only
  • 30 Amp Maximum Rating
  • NEMA 1 enclosure for indoor applications
  • 1.5/3.0 Horsepower 240 VAC single phase (standard/maximum)
  • The lugs on this device will accept (1) #14 - 8 AWG copper or (1) #12 - 8 AWG aluminum conductors per phase.
  • This safety switch is compatible with cartridge fuses class H or J
  • Neutral bar included
  • Equipment ground bar included
  • UL listed
  • Protection from live parts with cover closed
  • Protection from arcing during switching
  • Provides emergency disconnecting means
  • Protects switching components from environment
  • Cover lock-out provision to prevent opening by unauthorized personnel
  • NEMA 1 for indoor use
  • Return Policy
  • California residents
     see Prop 65 WARNINGS

Product Information

Internet # 100190295

Model # L221N

Store SKU # 1005527225


Dimensions: H 7.75 in, W 6 in, D 3.62 in


Product Depth (in.)

3.62 in

Product Height (in.)

7.75 in

Product Width (in.)

6 in




Electrical Product Type

Safety Switch


Mountable, On/Off Switch, Overload Protection, Short Circuit Protection





Maximum Amperage (A)


Maximum Wattage (W)

14000 W

NEMA Configuration


NEMA Configuration Receptacle

No Receptacle

Phase Type

1 Phase

Power Distribution Features

No Additional Features

Product Weight (lb.)

3.49 lb



Voltage (V)


Warranty / Certifications

Certifications and Listings

UL Listed

Manufacturer Warranty

Square D warrants equipment manufactured by it and sold through authorized sales channels to be free from defects in materials and workmanship for eighteen (18) months from date of invoice by Square D or its authorized sales channel.

Questions & Answers

Q:Is the terminal lug copper ? It is said aluminum or copper.
by|Mar 10, 2019
2 Answers
Answer This Question

A:  The Aluminum or copper is referring to the wire size and range per NEC it is 12-6 Al or 14-6 Cu / 1 conductor per phase. General Duty Safety Switches have aluminum lugs as standard, which accept both copper and aluminum wire. There are no optional copper lugs available. Regards, Customer Care

by|Mar 12, 2019

    A:  The terminal lugs are a plated copper alloy that is suitable for copper or aluminum wiring. The reference in the description to "copper or aluminum" applies to the wiring, not the lug. If you have a choice, use copper wiring.

    by|Mar 10, 2019
    Q:What is wiring diagram ?
    by|Oct 9, 2018
    3 Answers
    Answer This Question

    A:  You won't need a wiring diagram. Black to black, red to red and white to white.

    by|Oct 1, 2019

    A:  Wiring diagram is located on inside cover. Please contact Schneider Electric at 888-778-2733 if needing assistance with questions about wiring or consult local Electrician. Regards, Customer Care

    by|Oct 1, 2019

      A:  This is a double pole single throw (DPST) switch with internal fusing. You'll need two type K5 fuses, rated at 30 Amps or less, depending on your application. Attached is a photo of the wiring diagram inside the cover, along with a photo of the interior, as installed.

      by|Oct 1, 2019
      2 found this answer helpful
      Q:Can this be wired to eliminate using fuses as I will be wiring it through a breaker in the main panel?
      by|Nov 11, 2017
      3 Answers
      Answer This Question

      A:  No, fuses must be used cannot bypass non fused switches are not offer in this type of light duty switch. Regards, Customer care

      by|May 5, 2023
        1 found this answer helpful

        A:  Sure, you can, but why? The two type K5 fuses required aren't expensive, don't wear out, and can save you a headache. The breaker is sized to protect the household circuit and is matched to the breaker output wiring size going to the input side of the switch, but the choice of wiring from the switch to your application, chosen to match the load, might be smaller than the breaker capacity. The internal fuses should be chosen to match the output wiring (output side of the switch) and the load. Using the breaker, as you mentioned, with smaller wire gauge on the output side of the switch won't provide adequate protection. Back in the day of screw-in fuse panels and copper pennies, folks would by-pass the fuses by using a penny in place of a fuse. More than one housefire resulted. For the cost of a couple of fuses, its not worth the risk.

        by|Oct 16, 2018

        A:  I wouldn't recommend bypassing using fuses. The fuses for this switch are ridiculously cheap, like 4 bucks for a pack of 2 ( 2 fuses is all you need anyway) why risk burning down your home just to save 4 bucks?

        by|Sep 3, 2019
          Q:What is the difference between light duty and general duty?
          by|Sep 8, 2015
          2 Answers
          Answer This Question

          A:  How many times do you expect to switch from power on to power off? I use this switch, installed interior, on my garage heater and switch once a day, during the cold months. I'd call that very light duty. According to the Square D website: Light Duty has a 10 kA Short Circuit Current Rating and is useful for home applications in disconnecting power to workshops, hobby rooms, furnaces, and garages. General Duty has a 100 kA Short Circuit Current Rating and with Proper Current Limiting Fusing is designed for residential and commercial applications such as lighting, air conditioning, and appliances. Read more at their website.

          by|Oct 16, 2018

          A:  In some cases the fuse types, the AIC rating capabilities, duty applications. Light duty is available in Nema 1 only and General duty is available in Nema 1 or Nema 3R enclosures. The General duty is supplied with spring-activated quick-make, quick-break operating mechanism and Light duty is not.

          by|May 3, 2023
            1 found this answer helpful
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            Customer Reviews

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            I used this for my new installed electric hot water heater. I works great. Square "D" is the be...
            I used this for my new installed electric hot water heater. I works great. Square "D" is the best!!
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