OVERVIEW

Today's increased reliance on very sensitive electronics makes surge protection an important topic for Fiber to the Building (FTTB), Fiber to the Curb (FTTC) applications deployed in rural, suburban and urban areas. The Insurance Institute for Business & Home Safety study found that $26 billion dollars was lost due to non-lightning power surges. In addition, there are about 25 million lightning strikes in the US each year that cause between $650M to $1B in losses according to the Insurance Information Institute, State Farm©.

This page discusses how to best protect your Fiber to the Building and Fiber to the Curb applications and all associated components like the Rectifier, AC Power Panel, Transfer Switch, Battery Charger, Fiber Breakout Box, Street Cabinet, Wireless Radio, Router and Ethernet Switch. It covers the outdoor active cabinet owned by the Internet Service Provider or ISP as well as how the end-user of the high speed internet service can take steps to protect the equipment within the building.

Outdoor Active Cabinet

Selecting SPD for Fiber to the Building (FTTB)

NEC/NFPA 70 require that Surge Protective Devices (SPDs) shall be UL1449 Listed. This means selecting a surge protector is easier than it has ever been. There are only a few choices available for SPDs that are UL Listed for any of the most commonly used surge standards including UL1449 5th Edition, UL497B, and UL497E.

Internet Service Provider (ISP) Infrastructure

Recommended SPD for FTTB Outdoor Active Cabinet

Location	Equipment	System	Surge Protector Model #	Link
	Active Cabinet	120/240Vac	DS73US-120T/G
	Rectifier	48Vdc Power Output	DS230S-48DC
		Digital I/O	DLA-48D3
		Relay Output	DS230S-48DC
	Ethernet Switch	Cat. 6A	MJ8-C6A
	Charge Controller	48Vdc Power Input	DS230S-48DC

Building Equipment

Recommended SPD for Service Panel

Location	Equipment	System	Surge Protector Model #	Link
	Main Service Panel	120/208Vac	MDS750E-120Y

Recommended SPD for Network Switch (Ethernet)

Location	Equipment	System	Surge Protector Model #	Link
	Ethernet Switch	Cat. 6A RJ45	MJ8-C6A