Arc Charger N550c Manual | Connection & Installation
Part No. 729-110-040 Rev. 1.41 | June 2016
© 2016 Nelson Stud Welding, Inc. All Rights Reserved.
16
3.3
Input Power Connection
Before connecting ensure that the welder grounding conductor is
connected to a proper safety (earth) ground.
Before the Nelweld N550c welding unit is connected to the supply voltage, the following criteria must be
observed:
Only tested input power socket outlets with a tested protective conductor function may be used.
Once these criteria have been met, the switched-off welding unit can be connected to the supply voltage with
due regard to the safety advice.
GFCI CONCERNS
GFCI devices are not recommended to be used with the power unit. If using a GFCI is necessary, note that
there are inconsistencies between models and manufacturers. These inconsistencies may cause nuisance
tripping in some cases. See F Code list to adjust charging characteristics, which may improve the
performance on GFCI protected circuits.
DEDICATED CIRCUIT REQUIREMENTS
This power unit requires a dedicated 115V/20A circuit that powers nothing but the welding power source. Any
current draw from other devices on the same circuit may result in a current overload and cause circuit breakers
to trip.
INPUT POWER REQUIREMENTS
The Nelweld N550c may only be operated with an input power voltage as defined by the rating plate on the
back of the unit. See rating plates on the following page.
Arc Charger models may exhibit permanent failure or abnormal operation
when used in the vicinity of high frequency interference. TIG processes and
similar high frequency processes tend to interfere with and damage NCD+
circuit boards, particularly when sharing the same work piece. For more
information please consult your local Nelson service support.
Summary of Contents for ArcCharger N550C DOMESTIC
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