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III. ELECTRICAL CONNECTION INFORMATION
FOR PS740E-SERIES OVENS.
WARNING
Authorized supplier personnel normally
accomplish the connections for the ventilation
system, electric supply, as arranged by the
customer. Following these connections, the
factory-authorized installer can perform the
initial startup of the oven.
Check the oven data plate (Figure 2-17) before making any
electric supply connections. Electric supply connections must
agree with data on the oven data plate.
NOTE: The electric supply installation must satisfy the require-
ments of the appropriate statutory authority, such as the Na-
tional Electrical Code (NEC), ANSI/NFPA70, (U.S.A.); the
Canadian Electrical Code, CSA C22.2; the Australian Code
AG601; or other applicable regulations.
A fused disconnect switch or a main circuit breaker (customer
furnished)
MUST be installed in the electric supply line for each
oven; it is recommended that this switch/ circuit breaker have
lockout/tagout capability. The electric supply connection must
meet all national and local electrical code requirements. Cop-
per is the recommended material for the electrical supply
conductors.
Figure 2-17. Typical Electric Oven Data Plate
IV. ELECTRIC SUPPLY FOR ELECTRICALLY
HEATED OVENS
Power requirements for electrically heated ovens are usually
208 - 240VAC, 3-phase, 4-wire (3 ‘hot’, 1 ground), although
ovens built for export can have power requirements of 380VAC
and 480VAC. (These ovens have a 5-wire system.) A 2″
(51mm) diameter cutout/hole in the back of the machinery
compartment provides access for the electrical supply connec-
tions. Using flexible cable(s) for the electrical power supply
conductors requires a 2″ (51mm) strain-relief fitting (not fur-
nished) to enable safe access to the terminal block from which
oven power is distributed.
The supply conductors must be of the size and material
(copper) recommended to provide the current required; (refer to
the data plate for the ampere specifications). The electric
current rating for each conductor supplying a PS740E-Series
Oven must comply to local and national codes.
Typical specifications for each PS740E-Series Oven
are 208V or 240V, 3-phase, 4-wire, 60-ampere, 34.4kW. A
PS740E-Series Double Oven (Figure 1-2) installation would
require two 60-ampere service connections, one for each oven;
the 34.4kW power consumption also doubles for such an
installation to 68.8kW.
The 208V or 240VAC electrically heated oven uses two legs of
the supplied power to provide 208V or 240VAC power for the
oven control circuitry.
Electrical Junction Box
(One per oven cavity)
Figure 2-18. Utility Connection Locations for
Electric Ovens