Appleton Intraground™ N1 Series Nonmetallic Manual Motor Starters Catalog Page
Intraground™ N1 Series Nonmetallic Manual Motor Starters
Controls: nEC/CEC Explosionproof Motor startErs
© November 2016
Explosionproof
UNILETS™ for Use with Threaded Metal Conduit.
NEC:
Class I, Division 1 and 2, Groups C, D
NEMA 3, 4X, 7CD , 12
Applications
• Listed for use in Class I, Groups 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
— Methanol
• Not suitable for ethylene dichloride and 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.
Features
• Nonmetallic construction with metal imbedded grounding grid.
No need to install special wires and parts for grounding. Feedthru and dead-end styles are grounded through 1/2” or 3/4”
threaded conduit openings.
• 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 motor starters offer unsurpassed resistance to
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
wall (5/16”) and sound structural design (rounded corners)
provides superior resistance to impact and crushing.
• Excellent resistance to ultraviolet light and water. After 336
hours of immersion in water at +82 °C (+180 °F) and 720 hours
of exposure to ultraviolet radiation, there was no appreciable
change in tensile strength.
• Excellent conduit connection strength. UL pull-out and bending
resistance tests resulted in no effect on conduit connections.
• Excellent resistance to attack by fungi and mold.
• UL Temperature Index (continuous use temperature): +170 °C
(+338 °F) electrical properties, +170 °C (+338 °F) mechanical
properties with impact.
• Superior ammability resistance.
Standard Materials
• Body and cover: 30% glass-reinforced thermoplastic
polyetherimide
• Handle: Nylon 6/6
• Cover bolts: stainless steel
• Gasket: silicone
• Nameplates: aluminum
Standard Finishes
• Cover bolts: Teon®
• Nameplates: Mylar®
NEC Certifications and Compliances
• UL Standards: UL 508, UL 698, UL 1203
• UL Listed: E76550
Product Cross Reference
• For classied-location push button, pilot light and selector
switch control stations, see Controls Section.
• Sealing ttings not furnished. See Hazardous Location Fittings
Section.
Sealing fittings must be field installed adjacent to enclosure on all conduit runs.
Teflon and Mylar are registered trademarks of E. I. du Pont de Nemours and Company.
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Intraground™ N1 Series Nonmetallic Manual Motor Starters
Controls: nEC/CEC Explosionproof Motor startErs
© November 2016
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
Dead-End Feed-Thru
N1 Series Manual Motor Starters — Order Heaters From Following Page
Poles
1 1/2 or 3/4 Allen-Bradley N1D75-1MSAB N1DC75-1MSAB
1 1/2 or 3/4 Cutler-Hammer N1D75-1MSW N1DC75-1MSW
2 1/2 or 3/4 Allen-Bradley N1D75-2MSAB N1DC75-2MSAB
2 1/2 or 3/4 Cutler-Hammer N1D75-2MSW N1DC75-2MSW
Hub Size
(Inches) Starter
Dead-End Feed-Thru
Catalog Number
N1 Series Manual Motor Starters without Overload Protection — No Heater Required
Poles
2 1/2 or 3/4 Square D N1D75-2MS N1DC75-2MS
3 1/2 or 3/4 Bryant N1D75-3MS N1DC75-3MS
N1 Series Manual Motor Starters Horsepower Ratings
Allen-Bradley
Catalog Number Poles 115-230 Vac 32 Vdc 115 Vdc 230 Vdc Heaters
Bulletin 600 1 1 HP — — — (See Following Page)
Bulletin 600 2 1 HP — 3/4 HP 3/4 HP (See Following Page)
Cutler-Hammer ✢
Catalog Number Poles 120-240 Vac 32 Vdc 120 Vdc 240 Vdc Heaters
MST01 1 1 HP 1/4 HP — 1/4 HP (See Following Page)
MST02 2 1 HP 1/4 HP 1 HP 1 HP (See Following Page)
N1 Series Manual Motor Starters without Overload Protection Horsepower Ratings
2-Poles Rating 3-Poles Rating
Square D
Class 2510
Type KO-1
Hub Size
(Inches) Starter Furnished
30 Amp,250 Vac/Vdc
20 Amp,600 Vac 3HP 120 Vac
1HP 115 Vac 7-1/2HP 240 Vac
2HP 230 Vac 15HP 480 Vac
3HP 460-575 Vac 15HP 600 Vac
Catalog Number
Dead-End Feed-Thru
30 Amp, 600 Vac
Bryant
7810-UD
✢ Cutler-Hammer is a registered trademark of Eaton Corporation.
Allen-Bradley is a registered trademark of Rockwell Automation.
Sealing fittings must be field installed adjacent to enclosure on all conduit runs.
Furnished with 3/4” to 1/2” reducer.
Starters are furnished with one interchangeable heater. See following page for Heaters. Select heater number from heater selection table and add
appropriate suffix to catalog number. For example, a complete catalog number with Allen-Bradley heater: N1D75-1MSAB-AB1.
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