6
Installation manual 10679
Effective October 2017
BSPA Type 1 and Type 2 surge protective devices
Eaton.com/bussmannseries
6.6 Wiring installation
IMPROPER WIRING COULD CAUSE DEATH, INJURY AND/
OR EQUIPMENT DAMAGE. ONLY LICENSED/QUALIFIED
ELECTRICIANS WHO ARE TRAINED IN THE INSTALLATION AND
SERVICE OF ELECTRICAL SERVICES ARE TO INSTALL AND
SERVICE THIS EQUIPMENT.
TO MAXIMIZE THE SPD’S PERFORMANCE, TWIST AND BIND
THE WIRES TOGETHER TO REDUCE THE IMPEDANCE OF THE
WIRE.
ARC FLASH DURING INSTALLATION COULD CAUSE INJURY
OR DEATH. USE APPROPRIATE SAFETY PRECAUTIONS AND
EQUIPMENT FOR ARC FLASH PROTECTION.
Locate the electrical system’s applicable wiring schematic in Section
7. Wiring diagrams
.
Turn
OFF
power to the electrical equipment being connected to the
BSPA in accordance with NEC, CEC, state, county and local codes
for all safety ratings.
The BSPA units covered in this manual are designed with internal
overcurrent protection and do not require an external overcurrent
protective device (OCPD) unless otherwise required by NEC, UL,
and local electrical requirements to protect electrical conductors.
NEC Article 310.15 (B) (16) defines the maximum rating of the OCPD
required to protect the electrical conductors.
NEC shows 10 AWG conductors at 60°C typically requiring a 1-pole
(for single-phase systems), 2-pole (for split-phase systems) or 3-pole
(for 3-phase systems) 30 A branch circuit breaker to protect BSPA
conductors.
Twist and bind the wires of the BSPA unit tightly together. To
optimize BSPA performance, minimize overall lead length. To
maximize performance for wire lengths longer than four inches,
phase wires should be twisted once for each four inches of wire
length.
Note
: To maximize the BSPA’s performance, 10 AWG wire length
should be less than 14” (35cm) twisted and bound together.
If remote monitoring is required, connect the Form C relay contact
wiring to an alarm or building monitoring system. These relay
contacts are rated 2 A at 30 Vdc/250 Vac
Refer to Table 1 – BSPA Form C wire color codes for color codes of
relay wires (shown in the energized state).
Note
: Utilization of Form C contacts is optional. Connecting Form C
wires is not required for the proper BSPA operation.
Tighten and recheck all connections and mounting.
Contact
Color coding
COM
Blue/white
NO
Red/white
NC
Orange/white
Table 1. BSPA Form C wire color code.
Blue/white
Red/white
Orange/white
Common
NO (normally open)
NC (normally closed)
Form C Contact relay wire color codes
7. Wiring diagrams
Phase wire
Color code
L1 (Phase A)
Black
L2 (Phase B)
Black
L3 (Phase C)
Black
Neutral
White
Ground / protected earth
Green with yellow stripe
Table 2. BSPA phase wire color codes.
Figure 8. Single-phase (2W+G).
Figure 9. Split-phase (3W+G).
