Installation 3
VES, LLC
Elite-RS Panel Installation Manual
VF3529-00, Revision E01.03
H-Series
26 of 146
NFPA 72, Style 7
Connect wiring in compliance with NFPA 72, Class A, Style 7 requirements. For Class A, style 7 compliance, each
device must be wired in a Closed Nipple with two surrounding Short Circuit Isolator Modules. The two Short Circuit
Isolator Modules and the addressable device are enclosed individually or are shared in a common enclosure. If they
are enclosed individually, the individual enclosures must be joined by “closed-nippling”.
When using Class A, Style 7 wiring, the Short Circuit Isolator Module must be installed before and after each
addressable device on the SLC loop. Conduit must enclose wiring of the first and last Short Circuit Isolator Module
on the SLC loop.
Isolator Modules shall be connected less than five feet from loop-terminal-connections of the Elite-RS Panel to main-
tain compliance with Class A, Style 7 requirements. Closed Nipple devices share a common enclosure and include
single housings or raceways.
Common Enclosure
The figure below illustrates the “common enclosure” type of Closed Nipple connection containing two
short circuit isolator modules and a sensor:
Figure 3-17
Common Enclosure
Individual Enclosures
SLC loop connections must include closed nippling and conduit nippling to maintain compliance with individual
enclosures under NFPA 72, Class A, Style 7 requirements. Closed nippling encloses individual devices on SLC loops
and conduit nippling encloses wiring between these individual enclosures.
The figure below illustrates the use of closed nippling and conduit nippling on an SLC loop of the Elite-RS Panel:
Figure 3-18
Individual Enclosure
SHORT CIRCUIT ISOLATORS
SENSOR
COMMON ENCLOSURE
Reference manufacturer specifications for Short
Circuit Isolator Module and Sensor connections.
SHORT CIRCUIT ISOLATORS
INDIVIDUAL ENCLOSURE
SENSOR
CONDUIT
Reference manufacturer specifications for
Short Circuit Isolator Module and Sensor
connections.
