Using the MasterLock S3821 is easy. First, find the Miniature Circuit Breaker (120/240 V) you want to lock out. Place the device on the breaker handle. You can use the large, knurled thumbscrew to tighten it. If you need a more precise adjustment, you can use a screwdriver in the slot. The device is designed to work with various handle shapes and sizes, and it can lock adjacent breakers vertically or horizontally. It also works well with multi - pole breakers and tie - bar toggles. When it comes to maintenance, keep it clean. Since it's made of PC/ABS Thermoplastic, Nylon, and Stainless Steel, it's durable. But avoid exposing it to extreme heat or chemicals. Also, make sure to check the thumbscrew regularly to ensure it's still tight. And that's all you need to know to use and take care of your MasterLock S3821 Circuit Breaker Lockout Device.
