"Disconnect fuses on a service panel's main shutoff are designed to blow if there's a power surge or an overload. This is copper piping used to replace those fuses outside next to the meter base, in an effort to keep the power flowing. I thought using copper in place of a fuse was a myth until now, and this is a serious fire hazard."Dave Maudlin
Indy Pro Inspection Service, Inc.
Courtesy of The ASHI Reporter