Cutler-Hammer ATVISPE31000XSU, Instructions Manual

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I.B. ATS-SD02
Page 13
Effective 5/98
b. In stand-by systems, in accordance with article 702
of the National Electrical Code and/or
c. In legally required stand-by systems in accordance
with article 701 of the National Electrical Code.
Cutler-Hammer Automatic Transfer Switches are avail-
able to meet NFPA 110 for emergency and stand-by
power systems, and NFPA 99 for health care facilities
when ordered with the appropriate options.
Since Cutler-Hammer Automatic Transfer Switches uti-
lize specially designed switches and/or circuit breakers
as the main power switching contacts, these devices
must also be listed under the additional UL Standards
489 and 1087. Underwriters Laboratories utilize two
basic types of listing programs: a) Label service b) Re-
examination. UL489 and UL1087 employ a label service
listing program which requires an extensive follow-up
testing program for listed devices. Standard UL1008 for
automatic transfer switches lists devices under the re-
examination program which only requires a continual
physical re-examination of the components used in the
product to insure consistency with the originally submit-
ted device. Follow-up testing is not required by UL1008.
Representative production samples of switches and cir-
cuit breakers used in Cutler-Hammer Automatic Transfer
Switches are subjected to a complete test program identi-
cal to the originally submitted devices on an ongoing peri-
odic basis per UL489 and UL1087. The frequency of such
a re-submittal can be as often as every quarter for a low
ampere device.
Figure 3-10 Typical Switch Enclosure
NEMA Design Protection
Type
1 Indoor Enclosed Equipment
3R Outdoor Rain, Ice Formation
4/4X Indoor/Outdoor Dust, Rain, Splashing, Water,
Corrosion Resistant
12 Indoor Dust, Dirt and Non-corrosive
Liquids
Table 3.1 Transfer Switch Equipment Enclosures