Scaffold Resource uses products chosen specifically to meet the unique requirements of each job. When dealing with a structure as historic and noteworthy as the Mid-Hudson Bridge, Scaffold Resource made sure to protect the bridge itself as well as the travelers below.
GFCI (ground-fault circuit-interrupter) protection is required for many receptacles (outlets) throughout the house and outdoors. This protection can be provided either by a GFCI breaker or GFCI receptacles. There are advantages and disadvantages to each approach, depending on the installation.
A GFCI monitors the amount of current flowing from hot to neutral. If there is any imbalance, it trips the circuit. It is able to sense a mismatch as small as 4 or 5 milliamps, and it can react as quickly as one-thirtieth of a second. So let's say you are outside with your power drill and it is raining.