Electrical Notes And Legend - York YCAL0019 Installation, Operation And Maintenance Manual

FORM 150.67-NM1
ISSUE DATE: 4/28/2017
NOTES:
1. Minimum Circuit Ampacity (MCA) is based on 125% of the rated load amps for the largest motor plus 100%
of the rated load amps for all other loads included in the circuit, per N.E.C. Article 430-24. If the optional Fac-
tory Mounted Control Transformer is provided, add the following MCA values to the electrical tables for the
system providing power to the transformer: -17, add 2.5 amps; -28, add 2.3 amps; -40, add 1.5 amps, -46, add
1.3 amps; -58, add 1 amp.
2. The minimum recommended disconnect switch is based on 115% of the rated load amps for all loads included
in the circuit, per N.E.C. Article 440.
3. Minimum fuse size is based upon 150% of the rated load amps for the largest motor plus 100% of the rated load
amps for all other loads included in the circuit to avoid nuisance trips at start-up due to lock rotor amps. It is not
recommended in applications where brown outs, frequent starting and stopping of the unit, and/or operation at
ambient temperatures in excess of 95ºF (35ºC) is anticipated.
4. Maximum fuse size is based upon 225% of the rated load amps for the largest motor plus 100% of the rated
load amps for all other loads included in the circuit, per N.E.C. Article 440-22.
5. Circuit breakers must be UL listed and CSA certified and maximum size is based on 225% of the rated load
amps for the largest motor plus 100% of the rated load amps for all other loads included in the circuit. Other-
wise, an HACR-type circuit breakers must be used. Maximum HACR circuit breaker rating is based on 225%
of the rated load amps for the largest motor plus 100% of the rated load amps for all other loads included in
the circuit.
6. The "Incoming Wire Range" is the minimum and maximum wire size that can be accommodated by the unit
wiring lugs. The (2) preceding the wire range indicates the number of termination points available per phase
of the wire range specified. Actual wire size and number of wires per phase must be determined based on the
National Electrical Code, using copper connectors only. Field wiring must also comply with local codes.
7. A ground lug is provided for each compressor system to accommodate a field grounding conductor per N.E.C.
Table 250-95. A control circuit grounding lug is also supplied.
8. The supplied disconnect is a "Disconnecting Means" as defined in the N.E.C. 100, and is intended for isolating
the unit for the available power supply to perform maintenance and troubleshooting. This disconnect is not
intended to be a Load Break Device.
9. Field wiring by others which complies with the National Electrical Code and Local Codes.
LEGEND:
ACR ACROSS THE LINE START
C.B. CIRCUIT BREAKER
D.E. DUAL ELEMENT FUSE
DISC SW DISCONNECT SWITCH
FACT MOUNT CB FACTORY MOUNTED CIRCUIT BREAKER
FLA FULL LOAD AMPS
HZ HERTZ
MAX MAXIMUM
MCA MINIMUM CIRCUIT AMPACITY
MIN MINIMUM
MIN MINIMUM NON FUSED
RLA RATED LOAD AMPS
S.P. WIRE Single-Point WIRING
UNIT MTD SERV SW UNIT MOUNTED SERVICE (NON-FUSED
DISCONNECT SWITCH)
LRA LOCKED ROTOR AMPS
JOHNSON CONTROLS

ELECTRICAL NOTES AND LEGEND

SECTION 5 – TECHNICAL DATA
VOLTAGE CODE
-17 = 200-3-60
-28 = 230-3-60
-40 = 380-3-60
-46 = 460-3-60
-58 = 575-3-60
LEGEND:
Field Wiring
Factory Wiring
59
5 5