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4.5.1 Ground
The diameter of the ground should not be less than the diameters of the cables connected to the
terminals L and N.
If using multiple pieces of equipment, use a single-point ground.
If you cannot use a single-point ground, use a common-point ground.
Do not connect equipment ground wires together as shown below.
R T U-EC A T
The single-point gr ound is better .
R T U-EC A T
The common-point ground is permitted.
R T U-EC A T
The e quipment can n ot be g roun ded in this way .
Chapter 4 Installing and Wiring
A nother piece
of equipment
Another piece
of equipment
Anot her piece
of equipment
4_
4-5
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