Specifications

General Note: The RLA for use in the following tables is obtained by the selection of a specific unit by
McQuay. When shipped, a unit will bear the specific RLA, stamped on the nameplate, for the selected
operating conditions. The tables below are for 60 Hz, 460 volts and 50 Hz, 400 volts.
WMC 145S, Single Compressor
Single Point Connection, Standard
Table 11, WMC 145S Electrical Data
Field Wire
RLA LRA
Minimum Circuit
Max Fuse Size
Ampacity (MCA)
Quantity Wire GA
72 to 77 Amps 110 90 to 96 3 3 GA 150 Amps
78 to 80 Amps 110 97 to 100 3 3 GA 175 Amps
81 to 88 Amps 110 101 to 110 3 2 GA 175 Amps
89 to 92 Amps 110 111 to 115 3 2 GA 200 Amps
93 to 99 Amps 110 116 to 123 3 1 GA 200 Amps
100 Amps 110 125 3 1 GA 225 Amps
101 to 104 Amps 132 126 to 130 3 1 GA 225 Amps
105 to 111 Amps 132 131 to 138 3 1/0 225 Amps
112 to 120 Amps 132 140 to 150 3 1/0 250 Amps
121 to 133 Amps 154 151 to 166 3 2/0 250 Amps
134 to 140 Amps 154 167 to 175 3 2/0 300 Amps
141 to 150 Amps (1) 165 176 to 187 3 3/0 300 Amps
NOTE: (1) 50 Hz TT-400 Compressor only
Table 12, Disconnect Switch Size
RLA Single Point Connection
72 to 77 Amps 150 Amps
78 to 100 Amps 175 Amps
101 to 150 Amps 225 Amps
NOTE: Disconnect Switch will also be a Circuit Breaker.
WMC 145D, 150D Dual Compressor
Multi-point Connection, Standard
Table 13, WMC 145D, 150D Electrical Data
Field Wire RLA
Minimum Circuit
LRA
Max Fuse Size
(Per Compressor)
Ampacity (MCA)
Quantity Wire GA
52 to 55 Amps 72 65 to 69 3 4 GA 110 Amps
56 to 65 Amps 72 70 to 82 3 4 GA 125 Amps
68 to 77 Amps 94 85 to 97 3 3 GA 150 Amps
78 to 85 Amps 94 98 to 107 3 2 GA 175 Amps
89 to 91 Amps 124 112 to 114 3 2 GA 200 Amps
92 to 103 Amps 124 115 to 129 3 1 GA 200 Amps
104 to 110 Amps 124 130 to 138 3 1/0 225 Amps
111 to 113 Amps 124 139 to 142 3 1/0 250 Amps
NOTES
1. Data is for each circuit – 1 compressor per circuit
2. See General Notes on page
34.
34 Catalog WMC-4