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IB01602078E
Instruction Booklet
Page
14
Effective: September 2011
40-400A (480/600Vac) ATC-300+ 3-Postion
Contactor Based Transfer Switch
The rear of the enclosure is supplied with teardrop shaped
holes in the top and bottom mounting flanges to facilitate
mounting. It is also supplied with two positioning bolts
and various pre-tapped inserts to insure proper positioning
of the power panel anytime the power panel must be repo-
sitioned to accommodate a different cable entry position.
Cable entry holes are the responsibility of the customer.
ATS enclosures and all internal steel mounting plates, such
as the power panel mounting plate, go through a pretreat-
ment cleaning system prior to painting to ensure a durable
finish.
The standard ATS enclosure is NEMA 1 Type for general
use. However, a variety of enclosures are available to
address almost any environmental circumstance (see
Table 3).
Table 3. Transfer Switch Equipment Enclosures
3.7 Standards
Generac ATS equipment, enclosed in any of the enclosures listed
in Table 3, is listed for application by UL and ULC. In addition,
Generac ATSs are listed in File E38116 by Underwriters Labora-
tories, Inc. under Standard UL 1008. This standard covers
requirements for automatic transfer switches intended for use in
ordinary locations to provide lighting and power as follows:
a. In emergency systems, in accordance with articles 517
and 700 in the National Electrical Code, ANSI/ NFPA 70,
and the National Fire Protection Association No. 76A;
and/or
b. In standby systems, in accordance with article 702 of the
National Electrical Code; and/or
c. In legally required standby systems in accordance with
article 701 of the National Electrical Code.
Generac ATSs are available to meet NFPA 110 for emergency
and standby power systems, and NFPA 99 for health care facili-
ties when ordered with the appropriate options.
Standard UL 1008 for ATSs lists devices under the reexamination
program which only require a continual physical reexamination of
the components used in the product to ensure consistency with
the originally submitted device. Follow-up testing is not required
by UL 1008.
NEMA TYPE
DESIGN
PROTECTION
Open
Indoor
1
Indoor
Enclosed Equipment
3R
Outdoor
Rain, Ice Formation
12
Indoor
Dust, Dirt, and
Non-Corrosive Liquids