6 INSTALLATION, OPERATION AND MAINTENANCE MANUAL
FSPD, TPS4 03, TPS4 09, TPS4 11
Retro-fit Into Existing Panel with No Available Breaker Positions
Follow all applicable Codes:
Consider consolidating loads in a manner that might free breaker positions. A ten foot tap rule in NEC®
240.21(B)(1) allows you to tap the bus as long as the tap conductors are rated at least 10% of the ampacity of
the panel. In the case where the ampacity of the panel is larger than the wires of the SPD, consider tapping
the bus per NEC® 240.21(B)(1) and running appropriate size conductors to a safety switch fused to 30A.
Mount the SPD immediately adjacent to the safety switch.
Installation
Pre-Plan your installation
• Meet all National and Local codes. (NEC® Article 285 addresses SPDs)
• Mount SPD as close to panel or equipment as possible to keep leads short
• Ensure leads are as short and straight as possible, including neutral and ground.
• Consider a breaker position that is closest to the SPD and the panel’s neutral and ground
• Suggested breaker size is 30A-20A
• Make sure system is grounded per NEC® and clear of faults before energizing SPD
Connect to Mains Connect to Alarming
black Line(s) black NO (Normally Open)
white Neutral brown NC (Normally Closed)
green Ground yellow / white Common
1. Use a voltmeter to check all voltages to ensure correct SPD.
2. If SPD has Dry Contact, pre-plan their installation.
3. Remove power for panel. Confirm panel is deenergized.
4. Identify connection/breaker location and SPD location.
5. Make sure leads are short.
6. Remove an appropriately sized knockout from panel.
7. Mount SPD. Connect to equipment using an approved wiring method, including seals appropriate for
the enclosure rating.
8. Connect conductors as appropriate – short and straight as possible.(Note that Hi-Legs are Phase B
(orange).
9. Label or mark conductors as appropriate
Energized: black
Neutral: white
Ground: green
Hi-Leg (Delta units only): orange
10. Make sure system is bonded per NEC® and is clear of hazards or faults before energizing
(N-G bonding not per NEC® will fail SPDs: #1 cause of SPD failures).
11. Energize and confirm proper operation of indicators and/or options. If Audible Alarm cycles,
de-energize immediately and contact Siemens Technical Support.
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