Glossary terms beginning with J
- 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.