The Hubbell S1R6 series comprises fire-rated poke-through service fittings, cover assemblies, and power/data plates designed for installation in concrete floors. These devices facilitate power and data connections in finished concrete, carpet, tile, or terrazzo floor assemblies. The documentation details installation procedures, spacing requirements, and safety precautions for qualified electricians. The fittings are intended for use in 1, 1-1/2, and 2-hour rated unprotected reinforced concrete floors, or floors employing steel form units and concrete topping.
General Information and Applications
The S1R6 series is factory assembled and intended for use in reinforced concrete floors with thicknesses ranging from 2 ¼ inches over metal deck to a minimum of 3 inches for reinforced concrete slabs. The concrete should have a unit weight between 113 and 155 pounds per cubic foot to maintain fire resistance ratings. These service fittings are also compatible with floors employing steel form units and concrete topping (D900-series designs in the US, and F900-series designs in Canada). Provisions for accessibility in ceiling areas above the poke-through fittings are recommended for designs with suspended ceilings.
The documentation notes that these devices are not intended for use in high-traffic installations or to support furniture. For furniture feed applications, liquid-tight nonmetallic conduit is required for both power and data wires and cables to maintain fire classification.
Installation Procedures
The installation process varies slightly depending on the floor type. For carpeted floors, a 6.50" – 6.75" diameter hole should be cut into the carpet. For concrete floors, a 6.00"–6.12" diameter hole must be core drilled through the concrete. The service fitting is then inserted into the cored hole until the brackets align correctly.
Wiring, conduit, and junction box connections should be made in accordance with applicable electrical codes. When installing plates, the installation plate, black spacer, and screws should be removed, retaining the screws for re-installation. Data plates and associated data components are then installed into the service fitting, as detailed in Figures 6, 7 & 8 of the provided documentation. Hubbell power plates can be factory wired with receptacles and wires pre-installed. The plates are marked with the word "bottom" for proper orientation.
If additional space is required for devices exceeding 1.7" (43 mm) in depth but not exceeding 2.9" (73 mm), six standoffs can be attached to the mounting bracket. When installing into smaller diameter core drilled holes, some shearing of the flexible intumescent gasket material may occur, but the fitting should still sit flush against the floor.
Electrical Considerations and Safety
The documentation emphasizes the importance of safety during installation. A caution is provided regarding the risk of electrical shock, advising disconnection of power before installation and a strict prohibition against wiring energized electrical components. Conductors used with these devices should have 90°C or higher rated insulation and sufficient ampacity in accordance with the National Electrical Code (NEC) or CE Code.
Spacing and Quantity
Minimum spacing requirements dictate a minimum of 2 feet on-center (OC) between units. The documentation also specifies a maximum of one unit per 65 square feet of floor area in each span. These guidelines are crucial for maintaining the fire resistance ratings of the floor assembly.
Fire Resistance and Floor Assembly Compatibility
The S1R6 series is designed to maintain the fire ratings of the floor assembly when installed correctly, provided the concrete thickness and type are within specified limits. The documentation specifically mentions compatibility with 1, 1-1/2, and 2-hour rated unprotected reinforced concrete floors. It is critical to verify that the installed device does not compromise the overall fire safety of the building. The documentation states that maintaining these ratings depends on the thickness and type of concrete used.
Component Identification
The documentation references several components used in the installation process, including:
- (a) Plate
- (b1) Standoffs
- (f) Mounting bracket
- (h) Brackets
- (i) Flexible intumescent gasket material
- (j) Installation plate
- (l) Screws
- (o) Black spacer
These components are referenced in the installation instructions and diagrams provided within the documentation.
Conduit Requirements
For furniture feed applications, the use of liquid-tight nonmetallic conduit is specifically required for both power and data wires and cables. This requirement is in place to maintain the fire classification of the installation.
Conclusion
The Hubbell S1R6 series poke-through service fittings provide a method for bringing power and data to finished floors while maintaining fire resistance ratings. Proper installation, adherence to electrical codes, and attention to spacing requirements are essential for safe and effective operation. The documentation emphasizes the need for qualified electricians to perform the installation and highlights the importance of using appropriate materials, such as liquid-tight conduit for furniture feed applications. The fittings are designed for specific concrete floor types and thicknesses, and compliance with these specifications is crucial for maintaining the integrity of the fire-rated assembly.