TDK 750W HALF RACK technical manual Awg, Wire termination

2.Wire size should be selected to enable voltage drop per lead to be less than 1.0V at the rated current. Although units will compensate for up to 5V in each load wire, it is recom- mended to minimize the voltage drop (1V typical maximum) to prevent excessive output power consumption from the power supply and poor dynamic response to load changes. Please refer to Tables 3-2 and 3-3 for minimum wire length (to limit voltage drop) in American and European dimensions respectively.

Wire size	Resistivity		Maximum length in Feet to limit
			voltage drop to 1V or less
AWG	OHM/1000ft
		5A	10A	20A	50A	150A
14	2.526	80	40	20	8	2
12	1.589	120	60	30	12	3.4
10	0.9994	200	100	50	20	6
8	0.6285	320	160	80	32	10
6	0.3953	500	250	125	50	16
4	0.2486	800	400	200	80	26
2	0.1564	1200	600	300	125	40
0	0.0983	2000	1000	500	200	68

Table 3-2: Maximum wire length for 1V drop on lead (in feet)

Cross sect.	Resistivity		Maximum length in meters to limit
area				voltage drop to 1V or less
	OHM/Km
(mm²)		5A		10A	20A	50A	150A
2.5	8.21	24.0		12.0	6.0	2.4	0.8
4	5.09	39.2		18.6	9.8	4.0	1.4
6	3.39	59.0		29.4	14.8	5.8	2.0
10	1.95	102.6		51.2	25.6	10.2	3.4
16	1.24	160.0		80.0	40.0	16.0	5.4
25	0.795	250.0		125.0	62.0	25.2	8.4
35	0.565	354.0		177.0	88.0	35.4	11.8

Table 3-3: Maximum wire length for 1 V drop on lead (in meters)

For currents not shown in Table 3-2 and 3-3, use the formula:

Maximum length=1000/(current x resistivity)

Where current is expressed in Amperes and resistivity in ohms/km or ohms/1000ft.

3.9.3Wire termination

The wires should be properly terminated with terminals securely attached. DO NOT use untermi- nated wires for load connection at the power supply.

CAUTION

When local sensing, a short from +LS or +S to -V or -S or -LS, will cause damage to the power supply. Reversing the sense wires might cause damage to the power supply in local and remote sensing. (Do not connect -S to +V or +S to -V).

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83-507-5002 Rev. B