DZ Electrical Products
Amps, kA and mA: reading the ratings on switchgear
A switchboard label can carry three different current figures that mean three different things. Mixing them up is how the wrong device ends up in the board.
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DZ Electrical Products
3-pole or 4-pole? Choosing an isolator for three phase
What the pole count on an isolator actually switches, when the neutral has to break with the phases, and how to read IEC 60309 pin configurations.
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IP ratings explained: choosing the right protection for Australian installs
What the two digits in an IP rating actually mean, which ratings suit which Australian installation, and why "weatherproof" on a box is not a rating.
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