A weatherhead is the service entrance cap at the top of a conduit mast or service cable, with a hood and an insulating block that lets each conductor exit through its own downward-facing hole. Conductors leave it with drip loops below the head so water runs off before reaching the opening, then connect to the utility drop. It must sit above the point where the drop attaches and high enough for the required clearances over roofs, walkways and driveways.
Set the weatherhead above the drop attachment, leave three feet of wire out for drip loops, and the utility splices to it.
Also heard as
- service head
- weathercap
- service entrance cap
Related terms
Meter can
Meter socket enclosure where the utility revenue meter plugs in, mounted between the service drop and panel.
Rigid
Heavy-wall threaded steel conduit, the toughest raceway on site, used for services, exposed runs and hazardous areas.
Stinger
Lead that drops from a pole-top fuse cutout to a transformer's primary bushing, in lineman and service talk.
Chicago grips
Spring-jawed come-along grips that bite on a wire or cable so it can be pulled tight with a hoist.