Quota sub-item application and BOQ itemizing basis for special switch panels (sound-light control / key-switch / sensor / residual-current protection) (Beijing DB11/T 2382-2024 sub-items + GB/T 50856-2024 BOQ rules)

Topic Positioning

The quota and BOQ application bases for special switch panels (sound-light control, key-operated switches, sensors, residual-current protection). The quota side rests on the electrical sub-items of the Beijing "Construction Consumption Standard" DB11/T 2382-2024; the BOQ side rests on the itemizing notes of Appendices D and E of GB/T 50856-2024 "Standard for Calculation of Quantities of General Installation Works".

Core Conclusions

1. Quota application cross-reference (Beijing DB11/T 2382-2024 Appendix C, general installation works)

1. Sound-light control (delay self-extinguishing / time-delay energy-saving) -> C4-4-113 "time-delay energy-saving concealed switch", Table C.4.41-4 time-delay energy-saving and dimmer switch installation, unit "unit", labor (comprehensive Category II) 0.0520 work-days/unit; materials include switch 1.0200 units, insulated wire BV-2.5 0.3050 m, galvanized machine screws M4 2.0400 sets, other materials 3%; tools: other tools 3%; work content: cleaning, checking wiring, soldering/wrapping joints, fitting the switch, insulation megger test, testing etc.
2. Key (power-enable) switch -> C4-4-115 "key (power-enable) switch", Table C.4.41-6 key-switch installation, unit "unit", labor 0.0610 work-days/unit; materials include switch 1.0200 units, insulated wire BV-2.5 0.6100 m, galvanized machine screws M4 2.0400 sets etc.; work content as for switch-type sub-items (cleaning, checking wiring, soldering/wrapping joints, fitting the switch, insulation megger test, testing etc.).
3. Sensor panels (PIR and similar sensing types) -> C4-4-117 "sensor panel", Table C.4.41-8 sensor-panel installation, unit "set", labor 0.0850 work-days/set; materials include insulated wire BV-2.5 0.4072 m, plastic flexible conduit phi 6 0.5000 m, self-adhesive rubber tape 0.0200 rolls, black insulating tape 20 mm x 20 m 0.0200 rolls etc.
4. Residual-current protective switches (separately installed, rail-mounted) -> Table C.4.28-2 residual-current protective switch installation: C4-4-48 "single-phase" labor 0.0500 work-days/unit, C4-4-49 "single-phase" labor 0.2260 work-days/unit, C4-4-50 "with fuse" labor 0.5350 work-days/unit, all per "unit"; sub-item materials include control device 1.0100 units and rail 1.0000 lengths (C4-4-48/49); C4-4-50 additionally includes rubber grommets DN25 6.0000 units etc.; work content: unpacking, cleaning, inspection, installation and fixing, wiring etc.
5. Pricing basis: the "switch" and "control device" in the material columns are the panel/device main materials, priced at compilation-period price information or market inquiry.

2. Corresponding BOQ items (GB/T 50856-2024)

• Sound-light-control and similar panels are itemized as "lighting switches": Appendix D, Table D.13.1 lighting-fixture installation (code 030413), explanatory note 9 - "lighting switches include ordinary lighting switches, sound (light) controlled delay switches (controllers) etc."
• Residual-current protective switches are itemized under Table D.5.1 low-voltage electrical equipment (code 030405), note 1 - "low-voltage electrical switches include: switch cabinets, control switches, low-voltage circuit breakers, low-voltage disconnectors, knife switches, combined control switches, residual-current protective switches, variable-frequency controllers, centralized speed-control switches and other similar switches"; note 4: installation type means floor-standing, wall-embedded or wall-mounted; note 5: the wire reservations external to panels, boxes and cabinets follow Table D.17.3-3.
• Smart-home panels are itemized under Table E.7.1 smart-home systems (code 030507); the quota application of smart switch panels follows the actual system attribution (smart-lighting control / smart-home etc.), checked against the corresponding equipment sub-items of the intelligentization works.

3. Pitfalls

• Sound-light control and presence sensing are two different functions - do not mix: sound-light control applies "time-delay energy-saving concealed switch" (C4-4-113); where the device is actually a PIR presence sensor, apply "sensor panel" (C4-4-117) instead.
• The residual-current switch sub-items apply to separately installed switchgear; where the RCD is an internal component of a complete distribution box, check the box-installation work content to determine whether separate installation applies.

Applicable Boundaries

• The sub-item numbers and consumptions are from Appendix C (general installation works) of Beijing DB11/T 2382-2024 and apply to Beijing projects under this standard; other provinces/cities have different sub-item numbers and consumptions and must be converted per their current quotas.
• The BOQ rules (GB/T 50856-2024) apply nationwide.
• The labor consumptions are standard values on the "comprehensive labor Category II" basis - consumption indices not adjusted with market prices; labor/material/machinery unit prices are set separately at compilation-period prices.
• Smart/wireless panels with no matching sub-item in the applicable standard are quota-missing cases and must be handled as such.

Further Reading

• Beijing DB11/T 2382-2024 "Construction Consumption Standard", Appendix C general installation works: Table C.4.41-4 (time-delay energy-saving and dimmer switches, C4-4-113), Table C.4.41-6 (key-switch installation, C4-4-115), Table C.4.41-8 (sensor-panel installation, C4-4-117), Table C.4.28-2 (residual-current protective switch installation, C4-4-48 to 50).
• GB/T 50856-2024 "Standard for Calculation of Quantities of General Installation Works": Appendix D electrical equipment installation works, Table D.13.1 (lighting fixtures, 030413) note 9, Table D.5.1 (low-voltage electrical equipment, 030405) notes 1/4/5; Appendix E building intelligentization works, Table E.7.1 (smart-home systems, 030507).