of st paul minn under the name scotch cast as shown in fig3 the sealant 46 covers the button 38 and the ends of the wires 40 42 thereby electrically isolating the lamp 12 from any water that might accidentally enter the lamp enclosure 22 preferably the sealant 46 extends to both ends of the nipple 44 because most wires used inside the flexible conduit 18 include a ground wire 45 one end of an insulated wire 47 is embedded in the sealant 46 to provide an anchor for the ground wire 45 the wires 40 42 are connected to wires 16 17 by water proof wire nuts 50 which are sufficient to keep water away from the metal conductors in the wires 16 17 40 42 suitable water proof wire nuts are commercially available from king innovation of st charles mo under the name dryconn in the alternative conventional wire nuts can be made water proof by injecting a sealant such as the sealant 46 into the open end of the wire nuts 50 although a water proof wire nut 51 may be used to connect the ground wire 45 to the wire 47 the wire nut 51 is preferably not waterproof so the ground fault indicator acting on the wire assembly 15 at the transformer 14 will shut off in the event water seeps into the lamp enclosure 22 and the.