SECTION 16149

LOW VOLTAGE SWITCHING

PART 1	GENERAL

SECTION INCLUDES

Relays.

Power supplies and enclosures.

Local switches.

RELATED SECTIONS

Section [_____ - ____________________]: Programmable lighting controls.

Section 16123 - Wires and Cables.

Section 16130 - Boxes:	Luminaire outlets.

Section 16160 - Cabinets and Enclosures.

Section 16470 - Panelboards.

REFERENCES

ANSI/NFPA 70 - National Electrical Code.

SUBMITTALS

Submit under provisions of Section [01300.] [_____.]

Shop Drawings: Indicate wiring diagrams of system, showing interface with branch circuit wiring.

Product Data: Provide data showing dimensions and ratings for components.

Manufacturer's Instructions:	Indicate application conditions and limitations of use stipulated by Product testing agency specified under Regulatory Requirements. Include instructions for storage, handling, protection, examination, preparation, and installation of Product.

PROJECT RECORD DOCUMENTS

Submit under provisions of Section [01700.] [_____.]

Record actual circuiting and switching arrangements.

OPERATION AND MAINTENANCE DATA

Submit under provisions of Section [01700.] [_____.]

Maintenance Data: Include replacement part numbers.

QUALIFICATIONS

Manufacturer: Company specializing in manufacturing Products specified in this Section with minimum [three] [____] years [documented] experience.

REGULATORY REQUIREMENTS

Conform to requirements of ANSI/NFPA 70.

Furnish products listed and classified by [Underwriters Laboratories, Inc.] [testing firm acceptable to authority having jurisdiction] as suitable for purpose specified and shown.

EXTRA MATERIALS

Furnish under provisions of Section [01700.] [_____.]

Provide [two] [_____] of each relay type.

Provide [two] [_____] of each switch type.

Provide [two] [____] of each cabinet key.

PART 2	PRODUCTS

MANUFACTURERS

[____________________________] Model [__________.]

[____________________________] Model [__________.]

[____________________________] Model [__________.]

Substitutions: Under provisions of Section [01600.] [______.]

COMPONENTS

Power Supply: ANSI/NFPA 70; Class 2, [120] [277] [_____]/24 volt transformer, rated [75] [__] va momentary, [40] [__] va continuous, with silicon rectifier rated 20 amperes intermittent, [7.5] [___] amperes continuous, [30] [__] VAC, [100] [___] PRV.

Relays: Heavy duty, two-coil momentary contact type remote control lighting relays with contacts rated 20 amperes at [120] [277] [_______] volts and with isolated and non-isolated pilot contacts where indicated. Include clamp type screw terminals for line voltage connections.

Switches: Momentary contact [, three position] switches, [rocker] [toggle] [interchangeable] type, [ivory] [_____] color, rated [3 amperes at 25 VAC.] [[15] [20] amperes at 120 VAC.]

Key Switches: Match non-key switch ratings; provide [spade key] [cylinder lock] type.

Switches with Pilot Lamp: Momentary contact [, three position] rocker type, [ivory] [_____] color, rated 3 amperes at 25 VAC, with integral [red] [_____] pilot light.

Switch Plates: [Smooth plastic, [ivory] [brown] [______].] [_________________________________________.]

Master Selector Switch: [[8] [_____] position pushbutton type] [[12] [_____] position rotary dial type] [,with key lock out].

Remote Control Interface: Single momentary input to control [three] [_____] relay channels.

Multiple Relay Controller: Two independent channels with master control.

Blocking Diodes:	Provide units to allow selective switching of relays that are connected to master control circuits.

Programmable Interface Unit:	[[16] [32] [___] relay transceiver.] [_______________________________________.]

Cabinets and Enclosures:	Shop fabricate and wire. Include appropriate barrier strips for mounting relays and separating energy-limited wiring from line voltage wiring. Include knockouts for relay mounting. Include space for [_____] percent minimum additional relays and [one] [_____] additional power supply in each cabinet and enclosure. [Match cabinet construction to lighting and appliance branch circuit panelboards furnished under Section 16470.]

Remote Control Cable: Copper conductor, 300 volt insulation rated [60] [__] degrees C, individual conductors twisted together and covered with PVC jacket.

Plenum Cable: Copper conductor, 300 volt insulation rated [60] [__] degrees C, individual conductors twisted together and covered with nonmetallic jacket; suitable for use in air handling ducts, hollow spaces used as ducts, and plenums.

PART 3	EXECUTION

INSTALLATION

Install in accordance with manufacturer's instructions.

Use [20] [___] AWG [stranded] copper conductor building wire in conduit for low voltage wiring.

****** [OR] ******

Use [20] [___] AWG [stranded] copper conductor building wire in conduit for low voltage wiring in walls, above inaccessible ceilings, [within hollow spaces used as air handling ducts and plenums,] and where run exposed. Use remote control and signal cable suitable for purpose above accessible ceilings.

Install relays to be accessible.	Allow space for adequate ventilation and circulation of air.

Interface with [programmable lighting controllers specified in Section [_____.]] [building management system specified in Section [13085.] [______.]]

DEMONSTRATION

Provide systems demonstration under the provisions of Section [01670.] [_____.]

Demonstrate proper operation of system.

SCHEDULE

Low Voltage Relay LVR-1A:

Cabinet: RC-1.

Panelboard/Circuit: LP-A/1.

Local Switch: Room 21.

Master Switch/Position: MS-2/4.

Area Controlled: Room 21.

Low Voltage Relay LVR-2A:

Cabinet: RC-1.

Panelboard/Circuit: LP-A/3.

Local Switch: Room 9.

Master Switch/Position: N/A.

Area Controlled: Room 9.

END OF SECTION