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CAUTION

To avoid fire hazard or accelerated degradation of insulation, use   

copper conductors only with an insulation rating of 75º C min.  Size 

conductors for 60º C ampacity.

5.  Pull all branch circuit and ground conductors into enclosure, 

providing sufficient length to connect to enclosed switch terminals.

6.  Make electrical connections utilizing the wiring pattern established 

for your system.  Connect branch circuit conductors to enclosed 

switch screw terminals with corresponding terminals connected 

through same conductors attached to receptacle contacts.  Connect 

green grounding conductor to receptacle grounding screw.

Note:  Avoid conductors of excessive length which may crowd the switch 

contacts and restrict proper switch operation.

Figure 3

CAUTION

Receptacle housing must be securely attached into a permanently 

grounded conduit system in accordance with Article 250 of the     

National Electrical Code.

7.  Re-thread cover into housing.  Tighten cover until cover flange 

contacts body face.  Back off slightly to align access hole in lower 

edge cover with cover locking screw.

8.  Turn cover locking screw counterclockwise (outward).  This will lock 

cover in place and release the receptacle interior so that the switch 

can be operated.

9.  Test mechanically by aligning and inserting mating plug fully.  

Rotate plug clockwise as indicated on receptacle plate.  Rotate 

counterclockwise and withdraw plug.

Note:  Lockout holes are aligned when in the “OFF” position.
10.   Unused conduit entries must have plugs installed.

   
    

WARNING

Do not connect to power until the following electrical tests have 

been performed:

•  Make continuity check of wiring to verify correct phasing and 

grounding connections.

•  Check insulation resistance to be sure system does              

not have any short circuits or unwanted grounds.

WARNING

To avoid electrical shock always disconnect primary power source  

before opening enclosure for inspection or service.

WIRING DIAGRAM 1 - (FSQC2390 AND 3390 ONLY)
MAINTENANCE

Electrical and mechanical inspection of all components must be 

performed on a regular schedule determined by the environment and 

frequency of use.  It is recommended that inspection be performed a 

minimum of once a year.

WARNING

1.  Inspect switch wire terminals for tightness.  Discoloration due to 

excessive heat is an indicator of a possible problem and should be 

thoroughly investigated and repaired as necessary.

2.  Check grounding and bonding for correct installation and secure 

connection.

3.  Clean exterior surfaces making sure nameplates remain legible.
4.  Check tightness of all screws before using.
5.  Inspect housings and replace complete unit for those which are 

broken.

6.  Check contacts for signs of arcing or burning.  Discontinue use and 

replace complete unit if arcing is evident.

In addition to these required maintenance procedures, we recommend 

an Electrical Preventative Maintenance program as described in the 

National Fire Protection Association Bulletin NFPA No. 70B.

  Terminal 

Wire Size 

Torque

  Switch 

4 - 8 AWG 

50 lb. - in.

  Ground 

2 - 8 AWG 

40 lb. - in.

  Terminal 

Wire Size 

Torque

  Switch 

10 AWG 

20 lb. - in.

  Ground 

8 - 14 AWG 

12 lb. - in.

FSQ 30 Amp

FSQ 60 Amp

All statements, technical information and recommendations contained herein are based on information and tests we believe to be reliable. The accuracy 
or completeness thereof are not guaranteed. In accordance with Crouse-Hinds “Terms and Conditions of Sale”, and since conditions of use are outside 
our control, the purchaser should determine the suitability of the product for his intended use and assumes all risk and liability whatsoever in connection 
therewith.

                                                                                                                                                    IF 1363

Eaton’s Crouse-Hinds Business                                                                                             Revision 9
1201 Wolf Street, Syracuse, New York 13208 •  U.S.A.                                                  Revised 12/13 
Copyright© 2013                                                                                                        Supercedes 09/11

 

Check for dirt, grit, or other foreign material on the threads.  If any 

such material settles on these threads, clean them with kerosene 

or Stoddard solvent, then re-lubricate with Crouse-Hinds Type STL 

thread lubricant.  To avoid the possibilities of an explosion, oxidation 

and corrosion, do not use gasoline or similar solvents.

If any parts of the plug, receptacle or connectors appear to be 

missing, broken or show signs of damage, DISCONTINUE USE 

IMMEDIATELY.  Replace with the proper replacement part(s) before 

continuing service.

Nominal Diameter (Inches)

Minimum Torque Required for Plugs (lb-ft)

1/2”

25

1”

42

1-1/2”

100

CAUTION

Pipe threads have been treated at the factory with Crouse-Hinds® 

“STL” thread lubricant which acts as a lubricant and anti-seize agent. 

Whenever any of these parts are disassembled the threads should be 

treated with-”STL” before reassembly.

CAUTION

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