10250T3 EATON CUTLER HAMMER, 10250T3 Datasheet - Page 243

• Manufacturer Part Number: 10250T3
• Description: CONTACT BLOCK, 2NC, 6A, SCREW
• Manufacturer: EATON CUTLER HAMMER

Specifications of 10250T3

• No. Of Poles: 2
• Contact Current Max: 6A
• Contact Voltage Ac Max: 600V
• Contact Voltage Dc Max: 250V
• Switch Terminals: Screw
• For Use With: 10250T Series Pushbuttons And Indicating Lights
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant

March 2008
Summary of NEC Article 500
The NEC Article 500 explains in great
detail the requirements for the installa-
tion of wiring and electrical equipment
in hazardous locations. The purpose of
this summary is for general reference
only, the National Electric Code along
with other applicable authorities having
jurisdiction over the site should be the
installer’s guidelines when wiring or
installing electrical equipment in any
hazardous or potentially hazardous
location.
Class I, Division 2 Definition
Class I, Division 2 covers hazardous
locations where flammable gases,
vapors or volatile liquids are handled
either in a closed system, or confined
within suitable enclosures, or where
hazardous concentrations are normally
prevented by positive mechanical ven-
tilation. Areas adjacent to Division 1
locations, into which gases might
occasionally flow, would also belong
to Division 2 (NEC (500-5[b])).
Hazardous Location
Any area where there is the possibility
of explosion and fire resulting from
the presence of flammable vapors,
liquids or gas, or combustible dust or
fibers.
Summary of NEC Article 505
The NEC also classifies hazardous
locations for flammable gases and
vapors into zones under NEC 505. This
system is more in line with the Euro-
pean Standards, CENELEC and IEC,
with the major difference being that
NEC 505 only classifies gases and
vapors while CENELEC and IEC also
include dusts.
CA08102001E
Summary of Classifications — NEC 500 – 503
Note: For additional information on grouping of compounds, see NFPA 497M-1991 and
NFPA 325-1994.
Summary of Classifications — NEC 505
Class
I.
II. Dust
III. Fibers
Class
I.
For more information visit: www.eaton.com
Gas
Gas
Pushbuttons & Indicating Lights
Ratings
NEC 500 – 505, Class I Division 2
Division
1. Hazard may exist —
2. Potential hazard —
1. Hazard may exist —
2. Potential hazard —
1. Production areas
2. Handling and storage
Zone
0. Continuously present or
1. Likely to exist under
2. Not likely to occur in
May exist in atmosphere
under normal operating
conditions
May be present in
atmosphere only under
abnormal circumstances
OR location adjacent
to Class I, Division 1
location
May exist in atmosphere
under normal operating
conditions
May be present in
atmosphere only under
abnormal circumstances
areas
present for long periods
of time
normal operating or
maintenance conditions
or adjacent to Zone 0
normal operation and if
they do occur will only
exist for short period or
adjacent to Zone 1
Group
A. Acetylene
B. Hydrogen and manufactured gases containing
C. Petrochemicals (e.g. carbon monoxide, ether,
D. Petrochemicals (e.g. gasoline, benzene, butane,
A. Acetylene
B. Hydrogen and manufactured gases containing
C. Petrochemicals (e.g. carbon monoxide, ether,
D. Petrochemicals (e.g. gasoline, benzene, butane,
E. Conductive and combustible dust (resistivity
F. Carbonaceous dusts (resistivity >10
G. Non-conductive combustible dust (resistivity
F. Carbonaceous dusts (resistivity >10
G. Non-conductive combustible dust (resistivity
Easily ignitable fibers or flyings
Easily ignitable fibers or flyings
Group
IIC. Acetylene, hydrogen or equivalent hazard
IIB. Acetaldehyde, ethylene or equivalent hazard
IIA. Acetone, ammonia, ethyl alcohol, gasoline,
IIC. Acetylene, hydrogen or equivalent hazard
IIB. Acetaldehyde, ethylene or equivalent hazard
IIA. Acetone, ammonia, ethyl alcohol, gasoline,
IIC. Acetylene, hydrogen or equivalent hazard
IIB. Acetaldehyde, ethylene or equivalent hazard
IIA. Acetone, ammonia, ethyl alcohol, gasoline,
30% hydrogen by volume (e.g. butadiene,
ethylene oxide, propylene oxide)
ethylene, hydrogen sulfide, morpholine,
cyclopropane)
propane, acetone, ammonia, vinyl chloride)
30% hydrogen by volume (e.g. butadiene,
ethylene oxide, propylene oxide)
ethylene, hydrogen sulfide, morpholine,
cyclopropane)
propane, acetone, ammonia, vinyl chloride)
<10
but ≤10
coal)
≥10
sugar, plastics)
but ≤10
coal)
≥10
sugar, plastics)
methane, propane or equivalent hazard
methane, propane or equivalent hazard
methane, propane or equivalent hazard
5
5
5
ohm/cm) (metal dusts)
ohms/cm) (e.g. grain dust, flour, starch,
ohms/cm) (e.g. grain dust, flour, starch,
8
8
ohms/cm) (e.g. carbon black, coke dust,
ohms/cm) (e.g. carbon black, coke dust,
2
2
ohms/cm
ohms/cm
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