Page 1
Intraground™ N1 Series Nonmetallic Tumbler Switches
CONTROLS: NEC/CEC EXPLOSIONPROOF CONTROL STATIONS AND SWITCHES
© June 2017
Explosionproof
Enclosures and Covers Have Neutral Color. Non-Factory Sealed.
NEC:
Class I, Division 1 and 2, Groups C, D
NEMA 3, 4X, 7CD, 12
Applications
• Listed for use in Class I, Group C and D, Division 1 and 2
atmospheres such as:
— Diethyl ether
— Methyl ethyl keytone
— Acetone
— Toluene
— No. 3 fuel oil
— Ammonium hydroxide (20%)
— Benzene
— Regular unleaded gas
— Ethyl acetate
— Hexane and methanol
• Not suitable for:
— Ethylene dichloride
— Partially halogenated hydrocarbons.
• Sealing ttings must be eld installed adjacent to enclosure on
all conduit runs.
• Explosionproof. With sealing ttings installed at each conduit
entrance, the N1 Series enclosures withstood a hydrostatic
test of four times the maximum internal explosion pressure that
could be developed from a gas or vapor explosion in actual use.
Features
• Nonmetallic construction with metal imbedded grounding grid.
No need to install special wires and parts for grounding. Feedthru or dead-end grounded 1/2” or 3/4” conduit openings for
threaded conduit.
• Special grounding wire furnished with each box provides safe
grounding when cover is removed.
• Ideal for use in corrosive environments. Nonmetallic enclosures
with corrosion resistant parts coated with epoxy, Teon® or
Mylar® , these switches offer unsurpassed resistance to a
wide variety of corrosive chemicals.
• Unique labyrinth-path construction assures ame-tight joint
between body and cover.
• Silicone gasket, specially designed for the labyrinth-path joint,
prevents entrance of moisture without interfering with the
venting of cooled hazardous gases and vapors.
• Typical mechanical properties of 24,500 psi tensile strength,
3% elongation at break, 33,000 psi exural strength, and
1,200,000 psi exural modulus.
• Electrical properties of sample specimens: dielectric strength
(in air) of 769 at 1/16”.
• High strength thermoplastic polyetherimide, together with thick
walls (5/16”) and sound structural design (rounded corners)
provides superior resistance to impact and crushing.
• Excellent resistance to ultraviolet light and water.
• Excellent conduit connection strength.
• Excellent resistance to attack by fungi and mold.
• Excellent heat deection temperature: sample specimens rated
at +210 °C (+410 °F).
• UL Temperature Index (continuous use temperature):
+170 °C (+338 °F) electrical properties, +170 °C (+338 °F)
mechanical properties with impact.
• Superior ammability resistance.
• Enclosures have external mounting lugs for ease of mounting.
• Smooth, rounded integral bushing in each hub protects
conductor insulation.
• 20 Amp and 30 Amp units available for use with 120-277 Vac.
• Corrosion resistant, strong stainless steel Teon
head cap screws attach cover and body for approved ame-
tight construction.
• Operating handle has close-tolerance threaded stainless steel
shaft to meet explosionproof requirements. Provides positive
corrosion resistant operation.
• Handle may be locked in ON or OFF position.
Standard Materials
• Body and cover: 30% glass-reinforced thermoplastic
polyetherimide — neutral color
• Handle: nylon 6/6
• Cover bolts: stainless steel
• Nameplates: aluminum
Standard Finishes
• Cover bolts: Teon®
• Nameplates: Mylar®
NEC Certifications and Compliances
• UL Standards: UL 894, UL 1203
• UL Listed: E10523
Related Products
• For classied-location push button, pilot light and selector
switch control stations, see Non-Hazardous Control
Stations Section.
• For sealing ttings, See Hazardous Location Fittings Section.
®
coated hex
Sealing fittings not furnished. Sealing fittings must be field-installed adjacent to enclosure on all conduit runs. See Hazardous Location Fittings Section.
Teflon and Mylar are registered trademarks of E. I. du Pont de Nemours and Company.
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Page 2
Intraground™ N1 Series Nonmetallic Tumbler Switches
CONTROLS: NEC/CEC EXPLOSIONPROOF CONTROL STATIONS AND SWITCHES
© June 2017
Explosionproof
Enclosures and Covers Have Neutral Color. Non-Factory Sealed.
NEC:
Class I, Division 1 and 2, Groups C, D
NEMA 3, 4X, 7CD, 12
Aluminum grounding grid, imbedded into the nonmetallic enclosure during molding, provides complete grounding system.
Switch
1-Gang Tumbler Switches
1-Pole 1/2 or 3/4 N1D75-F1 N1DC75-F1 N1D75-F13 N1DC75-F13
2-Pole 1/2 or 3/4 N1D75-F2 N1DC75-F2 N1D75-F23 N1DC75-F23
3-Way 1/2 or 3/4 N1D75-F3W N1DC75-F3W N1D75-F3W3 N1DC75-F3W3
4-Way 1/2 or 3/4 N1D75-F4W N1DC75-F4W – –
Switch
1-Gang Covers and Switches
All covers furnished with four bolts and blank nameplate.
1-Pole N1K-F12 EFSFR1Q N1K-F12 EFSFR13Q
2-Pole N1K-F12 EFSFR2Q N1K-F12 EFSFR23Q
3-Way N1K-F34W EFSFR3WQ N1K-F34W EFSFR3W3Q
4-Way N1K-F34W EFSFR4WQ
Cover Only Switch Only
1-Gang Nonmetallic Mounting Bodies
For use with covers above.
No field work. No extra grounding wires or parts required.
Hub Size
(Inches)
Hub Size
(Inches)
20 Ampere - 120-277 Vac 30 Ampere – 120-277 Vac
Dead-End Feed-Thru Dead-End Feed-Thru
20 Ampere - 120-277 Vac 30 Ampere – 120-277 Vac
Cover Switch Cover Switch
Catalog Number
Catalog Number
Catalog Number
Dead-End Feed-Thru
1/2 or 3/4 N1D75Q N1DC75Q
Sealing fittings must be field-installed adjacent to enclosure on all conduit runs.
Furnished with a 3/4” to 1/2” NPT reducer.
20 Amp — 1 HP at 120 Vac and 2 HP at 240 Vac.
30 Amp — 2 HP at 120 Vac or 240 Vac.
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Page 3
Intraground™ N1 Series Nonmetallic Tumbler Switches
CONTROLS: NEC/CEC EXPLOSIONPROOF CONTROL STATIONS AND SWITCHES
© June 2017
Explosionproof
Enclosures and Covers Have Neutral Color. Non-Factory Sealed.
NEC:
Class I, Division 1 and 2, Groups C, D
NEMA 3, 4X, 7CD, 12
Nameplate Mounting Bracket
Description Catalog Number
Bracket for N1 Series NPBRKT-N1N2
To order bracket with control station, add suffix –NPBRKT to end of catalog number.
Note: Mount bracket between cover screws and cover. Do not mount bracket between ground joint flame path between
cover and backbox.
Dimensions in Millimeters (Inches)
Front Operated Tumbler Switches
Front Side
NPBRKT Nameplate Mounting Bracket
Secure bracket using
cover nameplate
screws.
Sealing fittings not furnished. Sealing fittings must be field-installed adjacent to enclosure on all conduit runs. See Hazardous Location Fittings Section.
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