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Amperage Chart
kW
208V
Input
1Ø
3Ø
3
15
6
29
9
43
12
58
13.5
65
15
72
18
87
24
115
27
130
30
144
36
173
100
45
216
125
54
260
150
81
390
225
Water heaters with amperage draw of 120 AMPS or more require factory installed
internal fusing to comply with Underwriters Laboratories requirements.
GPH Recovery Capacities
kW
Input
40°F
3
31
6
62
9
93
12
124
13.5
140
15
155
18
186
24
248
27
279
30
310
36
372
45
465
54
558
81
837
Multiply kW input by 3,412 to determine BTU input:
Example: 54kW x 3412 = 184,248 BTU's
240V
1Ø
3Ø
-
13
-
17
25
14
25
38
22
33
50
29
38
56
32
42
63
36
50
75
43
67
100
58
75
113
65
83
125
72
150
87
188
108
225
130
338
195
50°F
60°F
25
21
50
41
74
62
99
83
112
93
125
103
149
124
199
164
223
186
248
207
298
248
372
310
447
372
671
558
Recovery Computation Formula
GPH= (watts x 3.412) / (8.25 x °Temp. Rise)
277V
380V
1Ø
3Ø
11
-
22
9
32
14
43
19
49
21
54
23
65
28
87
37
97
41
108
46
130
55
162
69
195
83
293
123
Temperature Rise
70°F
80°F
90°F
18
16
14
35
31
28
53
47
41
71
62
55
80
70
62
89
78
69
106
93
83
142
124
110
160
140
124
177
155
138
213
186
165
266
233
207
319
279
248
479
419
372
14
415V
480V
3Ø
1Ø
3Ø
-
7
8
12
13
19
13
17
25
17
19
28
19
21
31
21
25
38
25
34
50
34
38
56
38
42
63
42
50
75
50
63
94
63
75
113
75
113
169
98
100°F
120°F
13
11
25
21
37
31
50
41
56
47
62
52
74
62
99
83
112
93
124
103
149
124
186
155
223
186
335
279
600V
3Ø
-
-
8
6
9
12
12
13
17
23
26
29
35
44
62
78
140°F
9
18
27
35
40
44
53
71
80
89
106
133
160
240
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