Where access to the hazard is infrequent, the installation of a fitted guard, that can be removed by use of a tool, may be an acceptable control, where the tool to remove the barrier or guard is not normally available to the operator.
Access may vary during each stage of the machinery and equipment life cycle. For example: • installation or removal o complete access from every area may be required and involve disconnection or connection of services, such as water, air, pipes, installation of electrical cable to switch board • operation o access for set up, operation and adjustment • maintenance, repair, cleaning, alteration or adaptation o access to remote areas may be required.
Emergency retrieval plans should allow for immediate local response in safely retrieving people to avoid fatalities.
Captive key systems rely upon a single key that is shared between the control panel (on switch) and the access gate lock of the physical barrier to the danger area. Removal of the key from the control panel can only occur when the switch is in the off position, and the gate will only release the key when in the locked position.