You’re a plumber. You don’t spend your days marking utility lines and digging trenches, but you work on water, gas and sewer service lines, so sooner or later you’ll have to dig. And if you have to dig, you first have to locate.To the uninitiated, understanding and using high-tech locating equipment can seem daunting. Transmitters, receivers, grounding stakes, milliamps, and hertz (Hz) and kilohertz (kHz) frequencies — how does it all work?The basicsAs confusing as it may appear, it all boils down to one simple thing: magnetic fields. If you think back to middle school science, you’ll no doubt remember
