22
Fig.3-7
Power Outlet
L: 220V mains system phase line; must be equipped with safety electrical switch (switch must be
installed in the phase line).
N: commonly known as the neutral line, supply power to the equipment with the phase line.
E: earth wire; the enclosures (earth terminals) of all electrical equipment are connected to this wire to
ensure safety. Resistance to earth should be
less than 5Ω.
The user must consult professional electrical installer (electrician), and ask the electrician to check and
ensure that the earth wire is securely connected!
If the power supply system does not have earth wire, ask the electrician to install grounding grid according to the
following method:
The grounding device must be knocked into a humid place around the house with 2-4 pieces of
4×35×1500mm angle steel, the distance between each other is 1m, then lead each piece of angle steel
out of the earth with 3×30mm flat iron and form a grounding grid.
Lay the ground grid properly, and measure its resistance to ground with the instrument (standard
resistance: 3-5 ohms).
The machine is equipped with a piece of RVV2.5mm2 yellow-green copper wire, of which one end is
connected to the grounding line terminal and the other end is connected to the earth wire of the
etching machine, as shown below:
①
3*30 Flat steel
②
Ground
③
4*35*1500 angle steel
Fig.3-8
Equipment Grounding Diagram
Attention
Improper grounding can cause high failure rate, and may lead to other accidents!
The Company assumes no responsibility and obligation for such failures and
accidents
①
③
②
1m
1m
1m
