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Technical Bulletin

Document No. 125-3596

January 8, 2013

Wiring Guidelines for Gamma Lighting Control Circuits

Siemens Industry, Inc.

Gamma Lighting Control Wiring Guidelines

125-3596

2013-01-08

This wiring guideline applies to KNX TP1 Bus, Analog (1-10V) Dimming Control, and

Digital Addressable Lighting Interface (DALI) Control used with Gamma lighting

controls sold in North America.

KNX-certified TP1 cable, Analog Dimming cable and DALI cable, which are

manufactured by most global wiring suppliers, are not currently listed for use on 277V

lighting circuits or available in North America. This guideline specifies alternative 300V

cables that are available for lighting voltages up to 277V. For 347V lighting circuits

600V power limited tray cable should be used.

Cable is consolidated into two types:

 Shielded pair 18 AWG solid 300V plenum for KNX TP1 Bus

 Unshielded pair 18 AWG stranded 300V plenum for both Analog (1 – 10V) and

DALI dimming control.

Only 300V plenum rated cable is sourced as most lighting control enters a plenum

space at some point. Suppliers also have non-plenum 600V versions, but pricing is

typically based on volume so non-plenum and 600V versions are not sourced. For

more information, see the Cable Specifications and Sourcing [➙ 5] section.

CAUTION

All Gamma power wiring changes must be done by an electrician.

Lighting control cable wiring may be done by authorized personal except were codes

require work to be performed by an electrician.

There is

no protection of the Lighting Control Bus or Dimming circuits against

destruction by accidental connection to AC line voltage! Ensure electrical separation

of lighting control conductors from lighting power conductors.

KNX TP1 Bus Cable

KNX is an International Standard used as the protocol for Gamma lighting control

devices. Twisted Pair 1 (TP1) is the communication specification including signal,

power and cable type connecting up to 64 devices, such as switches, sensors, relays

and interfaces. The connection is electrically referred to as the

bus

and logically

referred to as a

line

. A lighting control system may have many lines. All lengths in this

guideline refer to a single bus or line.

 The recommended bus cable is 18 AWG solid copper shielded twisted pair that is

rated 300V plenum.

Summary of content (7 pages)

PAGE 1
Technical Bulletin Document No. 125-3596 January 8, 2013 Wiring Guidelines for Gamma Lighting Control Circuits This wiring guideline applies to KNX TP1 Bus, Analog (1-10V) Dimming Control, and Digital Addressable Lighting Interface (DALI) Control used with Gamma lighting controls sold in North America. KNX-certified TP1 cable, Analog Dimming cable and DALI cable, which are manufactured by most global wiring suppliers, are not currently listed for use on 277V lighting circuits or available in North America.
PAGE 2
Wiring Guidelines for Gamma Lighting Control Circuits  Cable installation can reach its maximum length with three 1000 ft branches from the power supply. Other topologies are allowed as long as they do not exceed the maximum length.  Alternative cable segment length is based on comparison of DC resistance and conductor capacitance with KNX-certified 0.8 mm2 (20 AWG) cable. Lengths shown in the following Table meet the KNX time delay specifications.
PAGE 3
Cable Specifications and Sourcing Analog (1 to 10V) Dimming Control Cable CAUTION The electrician must ensure that, when looping lighting power through the dimming actuator switching relay L-conductors, the maximum connection current of 20A is not exceeded and that the cable and product are protected by the appropriate lighting power circuit breaker. Each analog dimming control channel will sink 1 to 10 Vdc from up to 60 sourcing-type dimming ballasts.
PAGE 4
Wiring Guidelines for Gamma Lighting Control Circuits DALI Control Cable DALI Control Cable Each KNX/DALI Gateway N 141/02 controls a single channel of up to 64 DALI ballasts.  The recommended dimming control cable is 18 AWG stranded unshielded twisted pair that is rated 300V plenum. HVAC signal cable is used for this application.  Nominal voltage must not exceed 277V for any cable run in the same conduit or tray with dimming control cable.
PAGE 5
Cable Specifications and Sourcing Cable Specifications and Sourcing Table 4: 6320FE 8771000 Communications Cable Wire and Cable Specification - Required Information. Description COMMUNICATION CBL 18AWG,SOL,2CS,CMP, WHITE JACKET Specifications Number of pairs 1 Resistance DCR: 6.385 Ω/1000 ft nominal Gauge and stranding 18 AWG (1-BC) Capacitance C-C: 70 pF/ft nominal Primary insulation type LSPVC Twists per foot: 4 nominal Nominal Insulation thickness 0.
PAGE 6
Cable Specifications and Sourcing Table 5: H-TP18-CMP and H-TP18-CMP-Box Wire and Cable Specification - Required Information. Description HVAC CBL 18AWG,STR,1TP,CMP, BLUE JACKET Specifications Number of pairs 1 Resistance DCR: 6.92 Ω/1000 ft nominal Gauge and stranding 18 AWG (7 × 26) Capacitance: N/A Primary insulation type PRPVC Twists per foot: 4 nominal Nominal Insulation thickness 0.009” Jacket Material: PRPVC Color code BLK/WHT Nominal Jacket thickness: 0.
PAGE 7
Table 6: Lighting Control Cable Sourced through Anixter.