8 Installation
Electrical Service Types
Below is a list of service types, with connections and recommended models. Note: the ground
connection improves measurement accuracy, but is not required for safety.
Electrical
Service (or Load) Types
Line-to-
Neutral (Vac)
Line-to-
Line
(Vac)
Meter
Service
Type
Meter
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1 Phase 2 Wire 120V with neutral
96 – 138
n.a.
3Y-208
N
and
Ø
A
1 Phase 2 Wire 230V with neutral
(non-U.S.)
184 – 264
n.a.
3Y-400
N
and
Ø
A
1 Phase 2 Wire 277V with neutral
222 – 318
n.a.
3Y-480
N
and
Ø
A
1 Phase 2 Wire 208V no neutral
n.a.
166 – 276
3D-240
Ø
A
and
Ø
B
1 Phase 2 Wire 240V no neutral
n.a.
166 – 276
3D-240
Ø
A
and
Ø
B
1 Phase 3 Wire 120V/240V with
neutral
96 – 138
166 – 276
3Y-208
N
and
Ø
A
3D-240
Ø
A
and
Ø
B
3 Phase 3 Wire Delta 208V no neutral
n.a.
166 – 276
3D-240
Ø
A
and
Ø
B
3 Phase 3 Wire Delta 400V no neutral
(non-U.S.)
n.a.
320 – 460
3D-400
Ø
A
and
Ø
B
3 Phase 3 Wire Delta 480V no neutral
n.a.
384 – 552
3D-480
Ø
A
and
Ø
B
3 Phase 4 Wire Wye 120V/208V with
neutral
96 – 138
166 – 276
3Y-208
N
and
Ø
A
3D-240
Ø
A
and
Ø
B
3 Phase 4 Wire Delta 120/208/240V
with neutral
96 – 138
166 – 276
3D-240
Ø
A
and
Ø
B
3 Phase 4 Wire Wye 230V/400V with
neutral (non-U.S.)
184 – 264
320 – 460
3Y-400
N
and
Ø
A
3D-400
Ø
A
and
Ø
B
3 Phase 4 Wire Wye 277V/480V with
neutral
222 – 318
384 – 552
3Y-480
N
and
Ø
A
3D-480
Ø
A
and
Ø
B
3 Phase 4 Wire Delta 240/415/480V
with neutral
222 – 318
384 – 552
3D-480
Ø
A
and
Ø
B
3 Phase 4 Wire Wye 347V/600V with
neutral
278 – 399
480 – 690
3Y-600
N
and
Ø
A
Table 1: WattNode Models
