If three people are servicing a machine, how many locks should be on the lockout hasp?

The correct number of locks on the lockout hasp when three people are servicing a machine should be three. Each person who is performing maintenance or service on the machine should have their individual lock on the hasp to ensure that they have control over the energy sources and the machine cannot be inadvertently started while they are working on it.

Having three locks signifies that all three individuals are actively involved in the servicing process, which emphasizes a safe work environment. This practice falls under the Lockout/Tagout (LOTO) procedures that are essential in maintaining safety during maintenance operations by making sure that all individuals are protected from unexpected energization or start-up of the machine. It reinforces the principle that every worker has the right to work in a safe environment where they can ensure their own safety and that of their colleagues.