Section II
General Product Information
006-0007207 MPC-1250DC Guide
Rev F
16 of 44
03/03/2022
Power Cable Wire Size
SynQor recommends the following cables for use with the MPC‑1250 DC Output Series:
AC Input:
SYN‑9101 MPC connection to NEMA 5‑20 Plug, 10’
SYN‑9104 MPC connection to NEMA 5‑15 Plug, 10’
SYN‑9102 MPC connection to Hardwire Termination, 10’
DC Input:
SYN‑9151 MPC connection to Ring Connectors, 10’
SYN‑9154 MPC connection to NATO Connector, 10’
DC Output:
SYN‑9174 MPC connection to Harwire Termination, DC Output, 10’
SYN‑9175 MPC connection to Fork Connectors, DC Output, 10’
Other options may be available. Contact [email protected] or visit the website:
for more information. If it is necessary to develop custom cables for
your application, please read through the following section for some important considerations.
Damage caused by improper wiring of cables will not be covered under SynQor’s warranty.
Both the input and output cables of the MPC carry substantial current, and since the wires in
these cables have resistance the current flowing through them causes a voltage drop from one
end of the cable to the other. In other words, the voltage across the cable at its downstream end
is smaller than the voltage across the cable at its upstream end. Mathematically, the amount that
the voltage drops is equal to the resistance of the cable’s wire multiplied by the current flowing
through the wire. It is therefore important to make sure that the resistance of the cable’s wire
is small enough to keep this voltage drop to an acceptably small value.
While this is an issue for all of the power cables, it is particularly important for the DC INPUT
and DC Output cables because the current flowing through it is very high (as high as 65 A for the
MPC‑1250 DC Output Series) and the voltage across it is already relatively small (as low as 22 V).
In fact, a common problem that arises (when the DC INPUT cable has too small a wire) is that the
voltage seen at the DC INPUT of the MPC falls below the minimum specified value of 22 V even
though the voltage at the source of the DC power is greater than 22 V.
The resistance of a wire depends directly on its length. A wire twice as long as another will
have twice the resistance, holding all other things constant. The resistance also depends on
the reciprocal of the cross‑sectional area of the wire, which in turn depends on the square of
the wire’s diameter. A wire with half the diameter of another will therefore have four times the
resistance, holding all other things constant.