Transcript Myers Hubs - Cooper Crouse

Myers Hubs
Crouse-Hinds
Training
Module
Myers Hubs
Outline
 History
 Applications
 Product Features
 Certifications and Compliances
 Types of Myers Hubs
 Additional Hubs Available
 Marketing Materials
Myers Hubs
History
• Pre-1949
– Welding was standard to bond coupling to enclosure, to
maintain a watertight connection and ground for conduit
entering enclosure.
• 1949
– Myers Hubs established. Invented the Scru-Tite® Hub.
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Watertight / Dust Tight Joint.
Positive Electrical Ground.
UL / CSA Approved.
Eliminated need for welding.
• 1997
– Myers acquired by Cooper Crouse-Hinds.
Myers Hubs
Applications
• Used in wash down, harsh industrial, outdoors,
hazardous, corrosive / chemical atmospheres,
for grounding, indoor rigid conduit, OEM, and
overseas applications (metric adapters).
• In conjunction with enclosures / wireways
fabricated from sheet steel, stainless steel, cast,
and non-metallic materials.
• Industries such as refineries, paper mills, food
processing, breweries, waste water treatment
facilities, chemical plants, pharmaceutical
plants, steel mills, and marine applications.
Myers Hubs
Product Features
1 Vibration Proof
– Strong, oversize nut with radial serrations
assures flush installation and positive
grounding.
2 Optional Grounding Screw For Added Safety
3 Captive “O-Ring” Gasket
– Impervious to corrosive moisture and
petroleum products. Buna-N gasket assures
positive water and dust-tight installations.
4 Precision Machine Cut NPT Threads
– Positive fit and simple installation.
Myers Hubs
Product Features
5 No Welding
– Unique serrations on both nut and hub bite into
metal assuring a positive electrical ground.
(UL approved for use with service entrance
conduit.)
6 Posi-Lok Insulated Throat
– Cannot come out. Made from flame retardant
Lexan®. Standard in sizes from 1/2” through 4”
• Fit Standard Knockouts.
• Hub Basic Scru-Tite zinc 1/2” – 2” products
available with optional chrome plate finish.
(add suffix - CP)
Myers Hubs
Certifications and Compliances
• UL Listed
• CSA Certified
– Class I, Division 2
NEC 501-4(b)
– Class II, Division 1 & 2
NEC 502-4(a)(b)
– Class III, Division 1 & 2 NEC 503-3(a)(b)
• For use with NEMA Enclosures 2, 3, 3R, 4, 4X, and 12.
(Check hub type for individual compliances)
• Optional IEC / CENELEC Hubs for:
– Zone 1, Ex e II
– Zone 1, Eex e II
– Zone 1, Aex e II
Myers Hubs - Types
Scru-Tite® Hub - ST and STA Series
• Available in zinc or aluminum.
• Sizes range from 1/4” through 6”.
Ground Hub - STG and STAG Series
• Available in zinc or aluminum.
• Sizes range from 1/2” through 6”.
• Provides ground screw on locknut.
Myers Hubs - Types
Stainless Steel Hub - SSTG Series
• 316 stainless steel construction
resists corrosion and pitting in
chemical atmospheres.
• Sizes range from 1/2” to 2”
• Grounding Screw provided on lock
nut.
Myers Hubs - Types
Through Bulk-Head Fitting - STTB,
STTBA, STTTB, STTTBA Series.
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Available in zinc or aluminum.
Available with or without a nipple.
Sizes range from 1/2” - 2”
For installation of conduit through fire
wall or partial bulkheads.
Myers Hubs - Types
IEC / CENELEC HUB - STGK or SSTGK
Series
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Available in zinc or stainless steel.
Sizes range from 1/2” - 2” in zinc.
Sizes range from 1/2” - 2” in stainless.
Class I, Zone 1, Ex e II - IEC approved.
Class I, Zone 1, EEx e II - CENELEC
approvals through DEMKO (European test lab)
• Class I, Zone 1, AEx e II - NEC Article 505
approved.
• Hub includes increased safety ground terminal
and locking screw on lock nut.
Myers Hubs - Types
Metric to NPT Adapter - STM and
SSTM Series
• Available in zinc or stainless steel.
• Sizes ranges:
– M20 to 1/2” up to …..
– M75 to 2 1/2” (zinc)
– M63 to 2” (stainless steel)
• Used to convert a threaded metric entry
to an NPT entry.
Myers Hubs - Types
Ground Nut - STGN and STAGN
Series
• Available in zinc or aluminum.
• In zinc sizes range from 1/2” - 2”.
• In aluminum sizes range from 1/2” – 6”
Myers Hubs - Types
Cap-Off - STC and STAC Series
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Available in zinc or aluminum.
Zinc Sizes 1/2” - 2”.
Aluminum Sizes 1/2” – 1”
Economical way to cap-off a knock
out.
Drain Plug
• Available in aluminum or stainless steel.
• 1/2” trade size.
• Available with locknut for 1/2” KO or
with NPT threads for threaded opening.
• Designed to drain any accumulated
condensation.
Additional Hubs
Raintight Malleable Iron Conduit Hubs
Product Features
• Male thread type
• Tapered Female thread for rigid conduit & IMC
• Recessed O-ring gasket assures raintight & dust tight
connections
• Insulated throat provides smooth pulling surface
• Locking screw on nut doubles as a grounding screw
for added safety
• Compete sizes range from 1/2” – 6”
Additional Hubs
Iron Space Saver Conduit Hubs
Product Features
• Male thread is on the nut for space saving
• Quick and easy when installing rigid conduit nipple
between two existing enclosures
• Insulated throat provides smooth pulling surface
• Furnished with SG sealing gasket
• Hub fits standard knockouts. No special tools
required
Myers Hubs - Marketing Materials
 Commercial Products Catalog
 Cross Reference Guide
 Commercial Products Pocket Guide
 Myers Hubs Product Brochure
 www.crouse-hinds.com