Specifications

016-538-B0-002 Rev. B
13
Table 2-1, Alpha Part Numbers for Square D Breakers
Fig. 2-6, Typical 240VAC Service Entrance Wiring
To Utility
Neutral (WHITE)
Neutral Bus
L1 (BLACK)
L2 (RED)
To Enclosure Receptacle
Breaker
Ground (GREEN)
#8AWG (minimum)
Copper Ground Wire
Ground Clamp
4
1
2
6
8
9
10
3
7
5
1
2
3
4
5
6
7
8
9
10
Install the customer-supplied external service disconnect between the utility power
connection and the APX-100W. Consult manufacturer instructions and local utility
codes for specifi c installation instructions and guidelines.
For pole-mount enclosures, attach directly to utility pole using ¼" x 2-¼" steel
wood screws.
If a utility power meter is used, secure its mounting base in the same manner.
Use a suitable conduit to interconnect the meter base, service disconnect and
power supply enclosure.
•
•
CAUTION!
A “high magnetic” trip breaker must be used to accommodate the high-inrush currents normally
associated with the start-up of ferroresonant transformers (400A, no-trip, fi rst-half cycle). Do not replace
this breaker with a conventional service entrance breaker. Alpha recommends only Square D breakers
because of their increased reliability in this powering application. Square D circuit breakers are available
from Alpha.
Description Alpha Part Number Square D Part Number
220V/240V Installation (15A) 470-224-10 Q0215
BBX-Ext. Service Disconnect 020-085-10 Q02-4L70RB (UL listed)
All local utility and building codes apply. If a meter is not used, service electric ground must be unbroken
to service disconnect.
NOTE:
2.0 Installation, continued
2.2 Connecting the APX-100W
2.2.2 External Service Disconnect