WAC 296-807-11005. Make sure switches are safe

(1) You must make sure the operating switch is located in a position that makes it difficult to accidentally operate the tool. (2) You must use the correct operating switch. (a) Make sure hand-held gasoline-powered chain saws have a constant pressure throttle control that will shut off power to the chain when the pressure is released. (b) Use a constant pressure switch that will shut off the power when the switch is released to turn on or operate any hand-held power tool. Exemptions: Some tools can use a lock-on feature with the constant pressure switch if the lock-on feature can be turned off with a single motion of the same finger(s) that turned it on. You can use a lock-on feature with these hand-held tools: 1. Drills; 2. Tappers; 3. Fastener drivers; 4. Grinders using a wheel greater than two inches in diameter; 5. Disc sanders; 6. Belt sanders; 7. Reciprocating saws; 8. Saber, scroll and jig saws using a blade with a shank width greater than one-quarter inch; 9. Other similarly operating powered tools. Exemptions: You can use a positive "on-off" switch with these hand-held tools: 1. Platen sanders; 2. Grinders using a wheel two inches or less in diameter; 3. Routers; 4. Planers; 5. Laminate trimmers; 6. Nibblers; 7. Shears; 8. Saber, scroll, and jig saws using a blade with a shank width of one-quarter inch (± .05 inch) or less. Note: The shank width of saber, scroll and jig saw blades is measured at the narrowest point on the blade shank.