RadioRA 2 RRD-8ANS Install Notes

Current call: Spare RRD-8ANS-WH is the right part for the storage light (Lutron Diagram 2 + white neutral pigtail). DIY is on hold after finding a multi-circuit gang and a dual-breaker lamp path on the right position. Electrician already coming for a new lab 20 A circuit — add the cross-feed check to that visit (do not ignore).

DeviceRRD-8ANS-WH

TargetNW storage light

PanelEast Garage + Storage 20A

GangMulti-circuit

FindingDual-breaker feed

NextElectrician + lab 20A

What we learned in the field

Fact	Detail
Part	Spare `RRD-8ANS-WH` (8 A lighting/LED). Not fan `2ANF`, not companions `RD-RD`/`RD-RS`. Not buying ~$250 `8S-DV`.
Old switch	Mechanical SP — only LINE + LOAD on the device.
Neutral	Needs a short white pigtail to the same-circuit white bundle (silver terminal on 8ANS).
Gang layout	Left two share one breaker. Right is a different circuit.
Storage breaker (directory)	Challenger panel · right column · 20 A “East Garage + Storage Lts + Bath” (sticker also lists master/SW bed lights).
Dual-breaker finding	A room light controlled from the right gang position stays powered unless two independent breakers are off (lamp test, not a pen tester): 20 A Water Side Landscape and 15 A Living Room Cathy + Hall (bottom floor). Separate singles, no handle tie, different amps.

Do not ignore the dual-breaker result. A real lamp energized by either of two independent breakers means those circuits can backfeed each other (often a joined hot in a multi-gang or downstream). That defeats “I turned my breaker off.” Have the electrician trace/fix it while already on site for the lab circuit.

Electrician scope (recommended)

Primary job: new dedicated 20 A circuit for the lab (as planned).
Add-on (yes — ask): diagnose why Landscape 20 A or Cathy/Hall 15 A alone can keep the same light on; separate any crossed hots/neutrals in the multi-gang; confirm each gang position dies on exactly one breaker.
Optional same visit: land the spare RRD-8ANS on the storage SP (Diagram 2) once the box is known-safe — or leave the mechanical switch if time is tight.

Add-on diagnosis is usually cheaper than a second trip. Ignoring a confirmed dual-feed is how someone works “dead” and isn’t.

Field photos

Multi-gang metal box with mechanical switch pulled forward; white conductors under red wire nut in the back — Multi-gang box. Target SP pulled forward. Whites under red nut are candidates for the same-circuit neutral pigtail — only after circuits are mapped.

Close-up of old single-pole mechanical switch body and yoke — Old SP — two hots on the device. Label LINE/LOAD before unhooking.

Lutron RRD-8ANS-WH RadioRA 2 switch box and device with green ground lead — Correct spare: `RRD-8ANS-WH`. Green lead = ground.

Parts (when the box is cleared)

Have / get	Item	Notes
Have	`RRD-8ANS-WH`	RA2 primary on/off
Have	Old SP + Lutron foldout	Rollback + Diagram 2
Get	White 14 AWG solid pigtail ~8–10″	Match gauge to whites in the nut (12 if the circuit is 12)
Get	Wire nuts, tape, strippers, needle-nose	Neutral splice + LINE/LOAD labels
Get	Meter (not only a pen)	Multi-circuit gang — prove dead

Wiring map (8ANS · Diagram 2)

RRD-8ANS wiring: LINE and LOAD from old switch; white pigtail to same-circuit neutral; ground

Editable SVG. Paper insert wins if labels differ.

LINE  → brass LINE   (from old switch)
LOAD  → brass LOAD   (from old switch)
NEUT  → silver       ← white pigtail → same-circuit whites only
                         (copy LEFT same-breaker 8ANS — not the right circuit)
GND   → green        ← bare/green

Safety rules for this gang

Kill East Garage + Storage… 20 A and any other breaker that still leaves a device in the gang live (at minimum verify Landscape 20 + Cathy/Hall 15 if the right position is involved).
Meter every yoke — multi-gang ≠ one circuit.
Neutral pigtail only onto the same-circuit white bundle as the left 8ANS. Never borrow the right circuit’s neutral.
If left and right neutrals share one nut, stop — electrician fix.
Do not open the right device to “trace” the dual-feed as a first DIY project.

Install steps (after electrician clears the box)

Breakers off · whole relevant set · target meters dead.
Label LINE/LOAD on the old SP.
Pull SP · bag for rollback.
White pigtail into same-circuit neutral · tug test.
Land 8ANS: GND → NEUT → LINE → LOAD.
Power on · local paddle · check GFCI behavior.
RA2 program later.

Not this job

RRD-2ANF — fan speed only
RD-RD / RD-RS — companions only
Ignoring a lamp that needs two independent breakers off

Electrician handout: Dual-breaker cross-feed service note (photos + truth table).

Provenance: Field box, spare labels, and Challenger panel directory photos August 11, 2026. Dual-feed conclusion from lamp-load test (not NCVT). Landings from Lutron RadioRA 2 Designer RF Maestro foldout Diagram 2. Personal lab notes — local code and a licensed electrician still win on faults.