
DESCRIPTION
7.25”
9.75”
12.00”
13.00”
8.18”
4.63”
4.63”
0.5” - 1.0”
Ceiling
Cut-Out
5.50”dia.
New construction housing for Mini Quiet Ceiling small aperture round 
trimless fixtures (QCM5001, QCM5002, QCM5003, QCM5004). 
For new construction applications. Insulation must be kept 3” from all 
sides and at least 1” above the housing.
SPECIFICATION FEATURES
A ...Housing
Housing and plaster frame: 18 gauge CRS 
with flat black powder coated internal 
finish. Adjustable trimless mud-ring can  
accommodate 1/2”, 5/8”, 3/4” & 1” ceiling 
E ...Mounting
Hanger Bars and Butterfly Brackets 
included for residential and commercial 
applications respectively. Perforated 
flaps for secure drywall installation.
thickness.
B ...System Protection:
Ceiling Cut-Out: 5.50”
Thermal protection provided to guard 
against overheating and misuse of 
insulation over and around fixture. 
Vent holes in housing provide cooler 
operation.
C ...Electrical
Integral j-box and low voltage (12V) 
transformer . 120V input, 12V output. 
Junction box is U.L. listed for through 
branch wiring. Includes five 1/2 trade size 
knockouts (six knockouts when magnetic 
xfmr. is specified)
D ...Lamp
12V MR16 50 watts max. (not included) 
Internal rotation ring with locking 
adjustment. Provides 360º rotation of 
trim and secures original trim position 
after relamping. “POSI-GRIP” bi-pin 
lamp socket for firm, mechanical lamp 
connection.
Catalog # Type
Project
Comments Date
Prepared by
Ceiling mudding compound is applied 
right to the edge of the fixture.
MINI 
QUIET CEILING 
TRIMLESS
QCM500
New Construction 
Housing
for Round Trim
FOR 12V MR16 50 watts max. 
ORD ERI NG INF ORM ATIO N
QCM500
Housing
QCM500 =  
Mini Quiet Ceiling  
New Construction Housing 
for Round Trim 
w/Integral Transformer   
www.coo perlighti ng.com
Transformer
ELC 
MAG 
=
  Electronic 
=
 Magnetic 
Voltage 
=
120 
 120 volts primary 
=
277 
 277 volts primary
Specifications and Dimensions subject to change without notice. 
RSA Lighting • 7945 Orion Ave. • Van Nuys, CA 91406 • 818-349-3030 • FAX 818-349- 3031 
rev. 091806