Safety Switches & Disconnect Switches

Safety switches are effective for disconnecting equipment and circuits from their power source in a swift and safe manner. These safety or disconnect switches are utilized in many ways in many industrial and commercial sectors, including being used for safe service entrance, safe disconnect for maintenance and testing, fault protection for motorized equipment, and for an emergency stoppage in the event of a complication.


When you install safety or disconnect switches, they can operate in two important ways. One, they give operators complete and near-instantaneous control over power where the switch is applied, allowing a complete cut in power at any time. Additionally, disconnect switches provide fault protection, monitoring and detecting shorts and overloads. If a fault is detected, the switch will automatically cut power, reducing risks to personnel and minimizing damage to circuits and equipment.

Safety switches/safety disconnects offered by PSI Control Solutions are offered in amperage ranges from 30-1200 as needed and are effective in protecting a wide range of equipment from heavy industrial and manufacturing tools, to simpler applications such as refrigeration and HVAC. Safety switches are ideal for use in manufacturing, medical facilities, gas stations and fuel storage, educational facilities, pharmaceutical, and more.

PSI safety switch products are housed in NEMA enclosures rated 1, 3, 3R, 4, 4X, 12 as per your environment and needs. These enclosures are suitable for:

  • NEMA 1 – Suitable for standard indoor use—protects against dust and debris ingress and minimizes risks from personnel contact.
  • NEMA 3/3R – Suitable for indoor/outdoor use with a degree of protection against precipitation in addition to standard protections.
  • NEMA 4/4X Effective for indoor/outdoor use and effectively sealed against all forms of precipitation, as well as the 4X variant featuring resistance to corrosives.
  • NEMA 12 – Rated for indoor use with protection against solid objects, dirt ingress, moisture, and personnel contact.

Safety Switch / Disconnect

Amp ranges available from 30-1200 as needed. PSI Control Solutions safety/disconnect switches are available in fusible and non-fusible. NEMA 4 and 4X enclosure options, with neutral bar required/not required.

Options for amp ranges are from 30-600 as you require, and 2, 3, and 4 poles are available as specified. NEMA enclosures 1, 3R, 4X, and 12 available as per your specifications.

Option to Install Fuses

PSI Control Solutions offers fuse installation as per your needs for safety switch products. Amp ranges included from 30-3000, and 2, 3, and 4 pole configurations are available.

Should I Use a Fusible or Non-Fusible Safety Switch?

Fused safety switches, or those fitted with a fuse in their construction, are generally considered the safer option overall. However, if the device being protected already has fault and overload protection outside of a fuse, then the fusible switch is not strictly necessary, and thus may be considered a waste of time and resources. Additionally, many tools and applications require that one or the other be used, as per NEC code stipulations.

Which your business uses, and for which applications, is based largely on a variety of factors including your current electrical safety equipment, electrical load and capacity, and the tool in question. For an in-depth answer, or for some guidance on which to choose for your needs, we would urge you to contact a PSI Control Solutions technician or product expert!