Service
HV
9 things filed against this subject, in every format the Bureau holds.
How a Utility Network Works, and What the Plans and Marker Plates Tell You
How the supply actually gets from the power station to a house, the cable types you meet on the way including old Hessian, and how to read a stats plan and a utility marker plate for what is really under your feet.
Watch 1:48:39 →Reading Utility Plans: Loop In Loop Out, Teed Off, and Tracing HV
Getting what you need out of a utility plan before the kit comes out: how street lighting is wired either looped in and out or teed off, what the voltage tells you, and the pre-planning that decides where you connect.
Watch 27:07 →What Happens If You Hit a Cable
The consequences of striking a cable, overhead and underground, the path of least resistance through a person, and the injuries that follow. The reason the locator comes out at all.
Watch 40:11 →What Happens in a Cable Strike: LV, HV and the Person Holding the Tool
What actually happens when a cable is struck, the difference between low and high voltage, where the earth and phases come into it, and what HSG47 requires of you before the ground is opened.
Watch 52:24 →The Blind Induction Sweep and Joint Orientation
No plan line to follow? The blind induction sweep works the whole area methodically, plus reading joint orientation and the 2x1 pattern.
Watch 2:17 →Locating HV: Why It Is the Hardest
HV sits deeper, often under the LV, and usually offers no connection point. Why the standard toolkit needs adapting before you go near it.
Watch 2:18 →Nulling Out: Sleeping the LV Signal
Nulling out puts a known signal to sleep so you can hear what is underneath: the dead zone on the display, and the HV below the LV.
Watch 1:44 →The Two-Man Parallel Sweep and the Airborne Check
One on the Genny, one on the CAT, ten metres apart. The sweep for cables you cannot connect to, and the airborne check that keeps the trace honest.
Watch 3:27 →Locating HV Cables with a Genny and CAT
Techniques and the things that make HV harder than LV: where you can and cannot get a connection, what the signal does on a bonded network, and how to read what comes back.
Watch 12:40 →