on the ss2 safety switch does it have a normally open contact or is it normally closed?

The switch is normally closed. When water raises the float this opens the connection. These float switches go bad every so often. In the case where the switch has gone bad and you are sure you do not have condensate clog in your line, you can cut the wire at the top of switch and twist together the wire to the unit and cover with a wire nut. You are going to have the switch replaced anyway, so you might as well enjoy your A/C without paying for an emergency visit from your local HVAC professional. Do this only if you are 100% sure you do not have a clogged line. I take no responsibility if your line is clogged and you suffer water damage.

Can this be put into a secondary drain pan that sits under the ac?

I don't see why not. Just make sure you have the wiring set up correctly to shut down the unit. I assume there is another switch in the primary drain pan.

Can the float level be adjusted, by rotating the float shaft on a thread(?), or ?

No, I don't believe it is adjustable. Since it is designed as a type of safety switch (to turn off AC unit) there isn't a need to adjust.

What is the inside diameter of the pipe that the switch slides into? Does the switch use a float?

3/4 inch id. switch does use a float

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Rectorseal 97637 Safe-T-Switch Ss2

Product ID: 152943626

Details

Operation mode
ON-ON
Current rating
25 Amps
Operating voltage
110 Volts
Contact type
Normally Open
Connector type
Plug In
Brand
Rectorseal

⚡125 Amp switching capacity

🔒Patented water-sealed reed/magnet switch

🧩Compact L-shaped design for tight spaces

Description

🔧 Power up your setup with the compact switch that means business!

DURABLE COMPLIANT - UL 508 certified with Schedule 40 PVC1 plastic components for long-lasting reliability.
CLOG RESISTANT DESIGN - Engineered to catch clogs in primary pan outlet nipples, ensuring uninterrupted performance.
PRE WIRED CONVENIENCE - Comes with 4-foot 18 AWG wires for quick, hassle-free setup.
ROBUST POWER HANDLING - Supports up to 125 Amps switching capacity for heavy-duty applications.
SEAMLESS INSTALLATION - L-shaped, plug-free design fits effortlessly in tight auxiliary pan outlets.

The Rectorseal 97637 Safe-T-Switch SS2 is a patented, water-sealed reed/magnet switch designed for auxiliary pan outlets. UL 508 compliant and built with durable Schedule 40 PVC1 plastic, it supports a 25 Amp carry capacity and a 125 Amp switching capacity. Its compact L-shaped design allows easy installation in tight spaces without a plug, and it comes pre-wired with 4-foot 18 AWG wires for quick setup. Ideal for professionals seeking reliable, clog-resistant electrical switching solutions.

Specifications

Manufacturer	Rectorseal
Part number	97637
Item Weight	209 g
Product Dimensions	5.08 x 13.97 x 20.96 cm; 208.65 g
Item model number	97637
Size	3/4"
Colour	WHITE
Style	Switch
Wattage	30 watts
Item Package Quantity	1
Switch Type	1-way
Plug profile	Plug-In Mount
Specific uses	personal
Batteries included?	No
Batteries Required?	No

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