Glossary terms beginning with J

Terms used within Transpower
Click one of the letters above to go to the page of all terms beginning with that letter.
job manager

A Transpower employee who is responsible for overseeing a contract.

joint box

An enclosure that contains the optical fibre joints between two lengths of fibre optic cable. Joint boxes can be either tower mounted or suspended.

joint control

Control and automatic load sharing of generators and HVDC poles on a group basis.

jug handle

A loop attached to the station earth used for connecting portable earth tailclamps.

jumper (connection)

A length of conductor connecting adjacent spans of a transmission circuit conductor, or switchyard bus or equipment.

junction box

A cubicle for marshalling LVAC, dc, control, protection, metering, etc. cabling.  This may be indoor or outdoor.