Also permits adequate access to cover screws for easy attachment of cover to FS, FD or other device boxLarge head cover screws are captivatedSingle cover units accommodate NEMA configuration receptacles for locking or non-locking blade plugs, or toggle switchesDuplex units accommodate one receptacle and one toggle switch or any combination of the twoCovers open all the way, permitting easy plug insertion and withdrawal, also permits adequate access to cover screws for easy attachment of cover to FS, FD or other device box, large head cover screws are captivatedUnique design of spring door hinge provides smooth action, duplex units have a separate hinge shaft for each spring door cover to reduce stress on the shaftsSpring door cover puts pressure on plug (without tilting plug) to hold plug in best position for providing optimum weatherproof seal