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54 PRODIGIT
3.4.6
Wire/Cable Guide
The following table provides a guide to the current carrying capability (ampacity) of
Both Metric and AWG sizes. Metric sizes are expressed as a cross sectional areas
(CSA). If in any doubt of a cables ampacity it is recommended that you ask your
Cable supplier.
Wire Size
AWG
22
20
---
18
---
16
---
14
---
12
---
10
---
8
---
6
4
3-5. . Protection features
The protection features of the 3110 series Electronic load modules are as follows:
3.5.1. Overvoltage protection: The Electronic Load input will turn OFF if the overvoltage
circuit is tripped. The message OVP will be displayed on the LCD. When the OVP
fault has been removed the load can be set to sink power again. While the unit
will attempt to protect itself given an OVP state it is strongly advised to guard
against any potential OVP fault state by using external protection and the correctly
rated electronic load.
The Overvoltage protection circuit is set at a predetermined voltage and cannot be
adjusted. The OVP level is 105% of the 3110 nominal voltage rating.
CAUTION: Never apply an AC voltage to the input of the 3110 series Load.
Do not apply a DC voltage that is higher than 3110 Load Module's rating. If
this advice is ignored it is likely that damage will be caused to the electronic
load module. This damage will not be covered by the warranty.
3.5.2. Over current protection (OCP): The OCP protection will engage if the current being
taken by the load reaches 105% of the load module's maximum current. The
message OCP will be displayed on the front panel and the unit will switch to its
Ampacity
CSA
Notes:
2
(A)
(mm
)
Ratings for AWG-sized wires derived from MIL-W-5088B.
Ratings for metric-sized wires derived from IEC Publication
Ampacity of aluminium wire is approximately 84% of
5.0
-----
that listed for copper wire.
8.33
-----
10
0.75
When two or more wires are bundled together,
15.4
-----
ampacity for each wire must be reduced to the
13.5
1
following percentages:
------
16
1.5
2 conductors 94%
31.2
-------
3 conductors 89%
25
2.5
4 conductors 83%
40
-------
5 conductors 76%
32
4
55
------
40
6
4. Maximum temperatures:
75
------
Ambient = 50° C
63
10
Conductor = 105° C
100
------
135
------
Table 3-6 Stranded Copper Wire Ampere Capacity
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