Enclosure Door Stops
Hoffman Door Stop Kits are designed for use with most standard Hoffman Type 4 and 12 enclosures to secure the door in an open position. The enclosures must have a “B” dimension of 16 inches or more and a door which opens horizontally. Door stop kits are not intended for use on CONCEPT window door enclosures or enclosures configured with a swing-out panel or swing-out rack frame.
Hoffman Wall-Mount Enclosure Door Stop Kits are designed for use with most standard wall-mount enclosures to secure the door in an open position. The kits are Type 316 stainless steel and are ideal for applications that require corrosion protection.
Hoffman Free-Stand or Floor Mount Enclosure Door Stop Kits are designed for use with most standard free-stand and floor-mount enclosures to secure the door in a minimum of 90 degree open position. The kits can be used in outside applications and meet Telcordia GR-CORE vertical door retainer requirements for wind loading conditions. The kits are Type 316 stainless steel and are ideal for applications that require corrosion protection. They are not intended for use in free-stand or floor-mount enclosures with quarter-turn latches. The quarter-turn latches will interfere with the door stop bracket when installed.
Products
Maintaining NEMA 4 Rating When Making Enclosure Penetrations
Cutouts are very common when modifying enclosures for push buttons, indication lights, conduit entries or mounting hardware. Cutting into an enclosure runs the risk of eliminating the protective nature of the NEMA rated attributes. Proper steps must be followed in order to preserve the NEMA rating of an enclosure.
Devices mounted to the enclosure must have the same NEMA rating as the enclosure. This means that if the devices are installed to the manufacturer's specifications, they will be able to maintain the NEMA rating of the enclosure.
Water tight conduit hubs must be used when running wire through a cutout in an enclosure. There are many different types of conduit hubs that are used to secure conduit to an enclosure. However, only certain conduit hubs are rated for a watertight seal. By using water tight hubs, the NEMA rating of the enclosure is maintained.
Bonded washers are necessary when mounting hardware to an enclosure. If standard mounting hardware is used, the NEMA rating of the enclosure will no longer be maintained. Bonded washers have rubber gaskets that make a watertight seal around the drilled hole. It is also important to make sure the material used for the bonded washer matches the material of the enclosure. Stainless steel enclosures require stainless steel bonded washers.