Toshiba T2N Covered metal ducts or metal pipe Parallel separation Up to, Meters, Or over

6 F 3 B 0 3 6 2

Considering resistance to noise, we recommend using either covered metal cable ducts or protective steel pipe. Table 9.3 lists the recommended minimum separations for parallel lines in this case.

Table 9.3 Recommended Minimum Separation Distance (Covered metal ducts and metal pipe) (Units: mm)

Cable installation method				Covered metal ducts or metal pipe
Parallel separation				Up to	Up to	Up to	Up to	Up to	501 meters
				10 meters	25 meters	100 meters	200 meters	500 meters	or over
Power	Up to 125 V, up to		10 A	10	10	50	100	200	250
cable	Up to 250	V, up to	50 A	10	50	150	200	250	250
	Up to 400	V, up to	100 A	50	100	200	250	250	250
	Up to 500	V, up to	200 A	100	200	250	250	250	250
	Levels exceeding the above			At least 500

When using cable ducts, install steel separators to separate power cables from coaxial cables as shown in the figure below.

Metal duct

	Separator
	Power cable
Coaxial cable	Instrumentation power lines

Solenoid and other control signals

Figure 9.1 Duct Internal Layout Example

When laying cables in a pit, use separators in the same manner as when ducts are used.

Separator (steel)

Signal lines Power source

Ground

(with a resistance to ground of 100Ω or less)

Figure 9.2 Pit Internal Layout Example

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