American Dryer Corp. ML-410 - Manual (Page 40)

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3. Electrical Connections
NOTE: A wiring diagram is included with each dryer and is located in the blueprint pocket
inside the left side control cabinet.
The main electrical input connections to the dryer are the 3-phase (3ø) power leads (L1, L2, and L3),
GROUND, and in the case of 4 wire service, the Neutral. These electrical connections are made at the
power distribution block located in the base front electrical enclosure.
If the dryer has an optional sprinkler circuit then a separate single-phase (1ø) source must be supplied to
the sprinkler circuit at the name plate voltage. These connections are made at the power distribution block
located in the base front electrical enclosure.
The main electrical 3-phase (3ø) connections (L1, L2, and L3) and the optional single-phase (1ø) connection
must be provided and installed in accordance with state and local codes. In the absence of these codes,
grounding must conform to applicable requirements of the National Electrical Code ANSI/NFPA NO. 70-
LATEST EDITION, or in Canada, the installation must conform to applicable Canadian Standards: Canadian
Electrical Codes Parts 1 & 2 CSA C22.1-1990 or LATEST EDITION. In ALL cases, a strain relief must be
used where the wire(s) enter the dryer electrical service (relay) box.
NOTE: A CIRCUIT SERVING EACH DRYER MUST BE PROVIDED.
4. Main Grounding
Grounding (earth) connections must be provided and installed in accordance with state and local codes. In
the absence of these codes, grounding must conform to applicable requirements of the National Electrical
Code ANSI/NFPA NO. 70-LATEST EDITION, or in Canada, the installation must conform to applicable
Canada Standards: Canadian Electrical Codes Parts 1 & 2 CSA C22.1-1990 or LATEST EDITION. The
ground connection may be to a proven earth ground at the location service panel.
NOTE: A grounding connection (terminal lug) is provided in the dryer in the Base Electrical
Junction Box.
For added personal safety, when possible, it is suggested that a separate ground wire (sized per local codes)
be connected from the ground connection of the dryer to a cold water pipe. DO NOT ground to a gas or hot
water pipe. The grounded cold water pipe must have metal to metal connections ALL the way to electrical
ground. If there are any non-metallic interruptions, such as a meter, pump, plastic, rubber, or other insulating
connectors, they must be jumped out with no. 4 copper wire and securely clamped to bare metal at both
ends.
IMPORTANT: For personal safety and proper operation, the dryer must be grounded. For
proper operation of the microprocessor (computer), an earth (zero) ground is
required.
NOTE: Grounding via metallic electrical conduit (pipe) is not recommended.