Keysight Technologies N6700 User Manual

2 Installation
32 Keysight N6700 User’s Guide
Wire Size
WARNING
FIRE HAZARD
Select a wire size large enough to carry short-circuit
current without overheating (refer to the table below). To satisfy safety
requirements, load wires must be heavy enough not to overheat while
carrying the short-circuit output current of the unit. Keysight Model
N678xA SMU wiring requirements are described on the following page.
Along with conductor temperature, you must also consider voltage drop
when selecting wire sizes. The following table lists the resistance for
various wire sizes and the maximum lengths to limit the voltage drop to
1.0 V per lead for various currents.
Note that the minimum wire size required to prevent overheating may
not be large enough to prevent over-voltage tripping or maintain good
regulation. Under most conditions, the load wires should also be heavy
enough to limit the voltage drop to no more than l.0 V per lead.
To help prevent nuisance tripping of the over-voltage circuit, select a
wire size sufficient to handle the FULL output current of the unit no
matter what the intended load current or current limit setting
Load lead resistance is also an important factor relating to the CV
stability of the instrument when remote sensing capacitive loads. If high
capacitance loads are expected, you should not use wire gauges heavier
than 12 to 14 AWG for long runs of load lead.
Wire size
Current-carrying capacity in Amps
for stranded copper wire
Resistance
Max. Length to Limit Voltage to 1 V/Lead
for 5 A for 10 A for 20A for 50
A
AWG
2 wires bundled
4 wires bundled
Ω/foot
Wire length in feet
20 7.8 6.9 0.0102 20 x x x
18 14.5 12.8 0.0064 30 15 x x
16 18.2 16.1 0.0040 50 25 x x
14 29.3 25.9 0.0025 80 40 20 x
12 37.6 33.2 0.0016 125 63 30 x
10 51.7 45.7 0.0010 200 100 50 20
8 70.5 62.3 0.0006 320 160 80 32
6
94
83
0.0004
504
252
126
50
Area in mm
2
2 wires bundled
4 wires bundled
Ω/meter
Wire length in meters
0.5 7.8 6.9 0.0401 5 x x x
0.75 9.4 8.3 0.0267 7.4 x x x
1 12.7 11.2 0.0200 10 5 x x
1.5
15.0
13.3
0.0137
14.6
7.2
x
x
2.5
23.5
20.8
0.0082
24.4
12.2
6.1
x
4
30.1
26.6
0.0051
39.2
19.6
9.8
3.9
6
37.6
33.2
0.0034
58
29
14.7
5.9
10
59.2
52.3
0.0020
102
51
25
10.3
Notes: 1. Capacity for AWG wires derived from MIL-W-5088B. Max. ambient temp: 55°C. Max. wire temp: 105°C.
2. Capacity for metric wires are derived from IE Publication 335-1.
3. Capacity of aluminum wire is approximately 84% of that listed for copper wire.
4. “x” indicates wire is not rated for the maximum output current of the power module.
5. Because of wire inductance considerations, it is also recommended that you keep your load leads twisted, tie wrapped, or
bundled together and less than 50 feet (14.7 meters) in length per lead.

Keysight Technologies N6700 Specifications

General

Brand	Keysight Technologies
Model	N6700
Category	Power Supply
Language	English