American Power Conversion SYMSTRF3I user manual Input/Output Wiring Procedure, Minimum, Wire Size

Input/Output Wiring Procedure

1.Mount the Input/Output Wiring Panel to the lower rear frame panel.

Note: The I/O wiring panel and the cover plate are shipped in the frame accessory package located in the upper right module bay of the frame. Remove the four mounting screws from the rear of the SymmetraTM frame, and use them to install the panel. Place the cover plate aside.

2.Attach flexible metal conduit to the wiring panel.

Note: If the pre-installed knock-outs do not fit your strain relief hardware, use existing knock-out as a pilot to create a new hole.

3.Pull the wire through the conduit. Leave enough wire extending from the conduit strain relief to reach terminal blocks.

4.Strip approximately 1/2” (13 mm) of insulation from the end of each wire.

5.Connect the ground wires to the green/yellow grounding terminal block connections.

Note: Both input and output grounds attach to the same terminal block. Make sure to wire them correctly.

6.Connect the neutral wires to terminal block connections marked “N” in blue.

Caution!

νTighten screws to ensure good electrical connection.

7.Connect remaining power wires to terminal block connections.

8.Inspect wiring for proper connections.

Note: Do not mount the wiring cover plate until the wiring verification procedure is complete.

	Wiring	Symbol		Description	Minimum
					Wire Size
1	Output Ground			Safety Ground (Green/Yellow)
	Install Second!
2	Output Neutral		N	Output Return (Blue)	#3 AWG (25mm2)
	Install Fourth!
3	Output Phase	L1		Output Power
A	Input Ground			Primary Safety Ground (Green/Yellow)
	Install First!				#8 AWG (10mm2) if a
B	Input Neutral		N	Input Return (Blue)	bypass transformer is
	Install Third!				installed.
C	Input Phase	L3		Input Power	#3 AWG (25mm2) if a
D	Input Phase	L2		Input Power	bypass transformer is
					not installed.
E	Input Phase	L1		Input Power

990-7166-001 Electrical Installation - Page 5