Appleton Intraground™ N1 Series Nonmetallic Tumbler Switches Catalog Page

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, Teon®  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 deection 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 Teon
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: Teon® 

• Nameplates: Mylar® 

NEC Certifications and Compliances

• UL Standards: UL 894, UL 1203

• UL Listed: E10523

Related Products

• For classied-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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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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