Being the Relevant Nec Requirement.
www.ul.com/codeauthorities or www.ul.com/markingGuides.
Your Comments or SGGESTIONS Are Welcom and Appreciated. They should be setht to:
UL ’s Codes and Regulatory Services department
ulregulatoryServices@ul.com
Preface
INTRODUCTION
A. general
B. Positive Indication
C. Interchangeable Trip Units
D. Interrupting Ratings
E. Terminations
F. Adjustable Trip
G. Special Markings
H. Fused Circuit Breakers
I. CIRCUIT BROAR/Group Circuit Interrupter
J. Circuit Breaker/Group Circuit Interrupter/Combining-Type Arc-Fault Circuit Interrupter
K. Circuit Breaker/Equipment Group Protection
L. Circuit Breaker Surge-Protective Device
M. High-Fault Protectors and Accessory High-Fault Modules
N. Solid-State Circuit Breakers
O. Accessories
P. Circuit Breaker Adaprs
Q. Circuit Protectors
R. Circuit Breakers for Use in Communications Equipment
S. Molded Ciz Circuit Breakers Also Certify (Listed) As Combining Type Arc-Fault Circuit Interrupters
T. Molded Ciz Circuit Breakers Also Certify (Listed) As Branch/Feeder Type Arc Fault Circuit Interrupters
U. Classify Molded Case Circuit Breakers for Use in Specified Equipment
V. Molded Ciz Circuit Breakers for Use in Photovoltaic (PV) Systems
W. Molded Ciz Circuit Breakers for Use in Battery Power Supply (BPS) Systems Systems
X. LOCATION
Circuit Breaker Markings
APPENDIX A: Ul Molded Case Circuit Breaker Product Categories
by Ul Can Be Found in APPENDIX A.
, Installation and Use Information, and Information on Product Markings and the Ul Mark to Be USed on the Product. Guide Information is available on ul product q ? AT Ul.Com/Pom/com/com/Com/com/
Additional information can be found at www.ul.com.
Any of the "Ul Certified" and Bear the Ul Certification Mark.
Important to RECognize that Not All Certification Agencies Make this distribution in their class service.
is to look for the ul mark on the product itset.
Facility to determine that they constinue to comply with the state (s).
The Ul Marks May Only Be used on, or in the connection with products certify by ul, and under the terms of a writen agreeen the manUfactuer and Ul.
Ul.com/piq to Quickly to review demiLED CERTICATION Information.
All Currently Existing Versions of Ul ’s Listing and Classification Marks Remain Valid and Should Continue to Be Accepted As an Indication of Certification.
is free and open to all regulators, but registration to use it is required.
Ul Listing Mark
Standards. The Ul Listed Mark Includes The Ul Symbol, The Word "Listed," The Product or Category name, and a Control Number Assigned by Ul.
Ul Classification Mark
"A Statement of the Scope of Evaluation, The Product or Category name, and a Control Number Assigned by Ul.
Number is marked, the type design marking is optional.
VOLTAGE RATING – All Circuit Breakers are marked with a voltage rating, Including: 24, 48, 65, 80, 125, 125/250, 200/400, 250, 600 VOLTS for DC, and 650To 1500 VOLTS for DC in 50 VOLT Increments; and 120, 127, 120/240, 208Y/120, 240, 277, 347, 480Y/277, 480, 600Y/347, 650, 690 Volts DC, and And
the voltage to group does not exceed 125 V.
TWO-And Three-POLE Common-Trip Breakers Rated 120/240V AC Are Intended for Use on 1-PHASE, 3-Wire Circuits, where the voltage to group do exceed 120 V.
TWO-And Three-POLE Common-Trip Breakers Rated 125/250 V or 125/250 V DC Are Intended for Use on 1-PHASE and DC, 3-Wire Circuits, where the voltage to grow does not exceed 125 V.
Circuit Breakers with A Single Voltage Rating are intended for use in circuits where the city voltage and the voltage to grow down exceed the voltage rate.
TWO VOLTAGES.
Based on the preceding paragraphs, "Slant -raated" Breakers (120/240, 208Y/120 V, ETC., As OPPOSED TO 240, 480 V, ETC.) are not intended for use "SLANT -RATED" Delta Systems.For example, a 3-point, 120/240 v breaker is not intended for use on a 240/120 V, 3-PHASE, 4-Wire, Delta System, BeCAUSE on the High Leg, The Voltage to Neutral is 208 V.In this instance, a 3-point, 240 v breaker should be using.
The number value alone is adequate.
Load, "unless therenno risk of electric shock when changing the trip unit.
Cover or Door.
, for exmple the Panelboard.
Electrical Operation (on and off) – If the "On" and "OFF" Markings Are Not Readily When An Electrical Operator is Installed, The Markings Appear On the ElectricAl Operation.
Electrical Operation (Trip and Reset) -The Electrical Operator May Also Indicate the "Tripped" positive of the circuit breaker.
ManuFacturer ’s name – all interchangeable trip units are marked with the manuFacturer’ s name, Trademark or Other RECOGNIZED Means for Identifying the ManuoFacturer.
Magnetic Settings -All Interchangeable Trip Units Are Marked with the Minimum and Maximum Settings for the Adjustable Magnetic Tripping Values.
IS Installed, The Interrupting Rating of the Overall Combination is Still Considered to Be the Lesser Rating Marked on the END-Use Equipment.
Wire only or an aluminum wire only, the marking includes the word "only." A breaker intended for use with No. 10-14 AWG solid wire only is marked "No. 10-14 AWG solid," Or an equivalent wording.
Ordinarily, The Terminals are Suitable for only one wire per hole.
, The Proper Wire Temperature Rating is 75 ° C and It is Optional for the Breaker to Bear This Marking.
Separatly Shipped Connectors -If the Wire Connectors are not provided with the circuit breaker when the manuFactuerer, The breaker is marked to indicate the proper connectors or connector terminal kit for the breaker. The terminal kit indicates the manUfactuer ’s name or trademark and prop.
Cable Connection only -A Circuit Breaker Rated More than 4000 A and Intended for Cable Connections Only IS Marked Academy.
On the table shown belW:
Circuit breaker
BUS BARS PER TERMINAL
Frame size, a
Number
Size, in.
1600
2
1/4 x 3
2000
2
1/4 x 4
2500
2
1/4 x 5
OR 4
1/4 x 2-1/2
3000
4
1/4 x 4
4000
4
1/4 x 5
5000
6
1/4 x 5
6000
6
1/4 x 6
Marking May Be on the Trip Unit.
The Installer at the time the breaker is set. The Notations -Type a and Type B -Art Required to be Marked on the Breaker. They are designations used to detymine.
Marked "Equipment Protection only".
NON-CONDUCTING Enclosure-A Circuit Breaker Not Intended for Use in a Metal Enclosure is Marked "Suitable for Use in a Non-Conduction Enclosure only."
VenTilates Enclosure -A Circuit Breaker for Use in A Ventilate EnClosure is Marked to Identify the Enclosure Or to Indicate the Proper Enclosure Size. And local and size of the venTilating openings.
Marked to indicate the suitability. These devices may be used in a 40 ° C amBient unless Marked 25 ° C.
The available symmetrical current.
Class CTL CIRCUIT BREAKERS will Comply with the Lighting and Appliance Branch-Circuit Panelboard Requirements in Previous Edition.
"Delta" -A Delta Breaker is a 3-POLE-3-PHASE CIRCUIT BREAKER Intended to have two Poles Connected to a Bus Structure and a Third Pole Isolated, and is marked "For Replacement user."
2-POLE-3-PHASE RATED-A 2-POLE CIRCUIT BREAKER Marked "1-PHASE-3-PHASE" or "1?-3?" May Be user on 3-pHASE, Corner-GROUNDED DELCUITS, or On Single-PHASEcircuits.
applications "or an equivalent statement.
Other Poles. The FourTh (neutral) Pole of a 4-POLE CIRCUIT BREAKER is Marked "Protection-_% In". The percentage indicated is 0, 50 or 100.
Single-Phase Multi-Wire Circuit Includes in ITS Marked Voltage Rating The TERM "Only for USE in 1-PHASE CIRCUITS" "" OR An Equivalent. The Neutral Pole of a 3-POLE BREAKER Marked Only for Use in Single Phase Circuits Will Be Clearly Identify.
Document that details the markings, and a reference to the document on the circuit breaker.
For a 75 ° C Conductor with 90 ° C insulation and userd with 90 ° C Wire Connectors.
"SWD" – A Circuit Breaker Rated 15 OR 20 A, 347 V AC or Less, May Be Marked "SWD" and is Suitable for Switching Fluorescent Lights on a Regular Basis.
Independent Trip-A 2-POLE CIRCUIT BREAKER that Does Not Have An Internet Trip Feature is Marked "Independent Trip" or "No Common Trip." An External Handle Tie Alone Does Not Qualify as a Common Trip Mechanism -A Breaker of this type is marked to independence breaker.
Necessary Information. If it is all allary to reply a part, such as a barrier or shield, the marking all includes replacement ins.
The class CTL Requirements for Circuit Breakers and Panelboards.
"HID" – A Circuit Breaker Rated 50 A Maximum, 480 V or Less, and Intended to Switch High Intensity Discharge (Hid) Lighting Loads on a Regular Basis is Marked ""
Installed in this equipment "with instances for attaching the label to the equipment.
LINE and LOAD IDENTIFICATION – All Fuse Circuit Breakers are "line" and "load." The "load" Marking is on the same, the controls as the fontacts as the fontActs or high-fract propectors.
Identification of Fuses-All Fuse Circuit Breakers are marked to indicate the fuses or high-fract forwardors with white they are to be used.
General Markings-These Circuit Breakers are Also Marked as Outlined for All Breakers. See items 1-4, 6-7, 14-23, 29-42 and 72-75.
Should Caut Cause the InternaL Mechanism to Function to Trip the Breaker.
"Class A" Marking -All CB/GFCIS Are Marked "Class A," Indicating that the cb/gfci has a group trip threshold of 6ma maximum.
The CB/GFCI, or in LITERANRIED with the CB/GFCI, is information founding that the user is not publicly is map, the
The Ungrounded Conductors are a contracting color. The color green cannot be used.
General Markings-These Circuit Breakers are Also Marked as Outlined for All Breakers. See items 1-7, 14-20, 29, 31, and 39-42.
J1. Device Identifier -These Devices are marked with words
A Signal that simulating a group followed by an arc fault is injectd, and only when both Success Walk the internsal mechanis report by means of triping
J3. "Class A" Marking -ALL CB/GFCIS Are Marked "Class A," Indicating that the cb/gfci has a group trip threshold of 6ma maximumum.
In the form of printend material, quick response (qr) code, or an address on the internet where users can download the required instances.
Are White or Gray; The Terminals for the Ungrounded Conductors are a contracting color. The color green cannot be used.
J6. General Markings-These Circuit Breakers are also Marked as outlined for all breakers. See items 1-7, 14-20, 29, 31, and 39-42.
"Test" Function -The "Test" Button on A Circuit Breaker with Equipment Group Protection (CB/ EGFP)
Trip Level Marking – All CB/EGFPS are marked to indicate the group fault trip threshold of the device, in milliampers.
Instructures -all CB/EGFPS are provided with instances for the installer.
Use Marking -A CB/EGFP Shall Be Marked "Equipment Protection only"
General Markings-These Circuit Breakers are Also Marked as Outlined for All Breakers. See items 1-7, 14-20, 29, 31, 39-42 AND 73-76.
Types -These Devices are Marked Type 1, 2 or 3 Whigh Delineates the Appropriate InstalLial Location with the Electrication System.
VOLTAGE Protection Rating – These devices are Marked with a Surge Voltage Protection Rating.
Maximum Continuous Operation Voltage Rating (Mcov) -These Devices are marked in Volts, for Type 1 and 2 SPDS at Both Line-Line-to-Neutral.
Nominal Discharge Current (in) Rating -in Amps or Ka for Type 1 and 2 SPDS.
SHORT-CIRCUIT CURRENT RATING (SCCR)-in Amps or Ka for Type 1 and 2 SPDS.
General Markings-These Circuit Breakers are Also Marked as Outlined for All Circuit Breakers. SEE ITEMS 1-7, 14-21, 29, 31, 39-42, and 43.
Type Designation-All High-FAULT Protectors and Modules are marked with their type design.
Manufacturer ’s name-all high-fract propectors and modules are marked with the manufacturer’ s name, trademark, Or Other Recognized Means for Identifying the ManuoFacturer.
Terminations-All High-FAULT MODULES Are Marked with their Wire Termination Information. See item 15-22.
Circuit Breaker-All High-Fault Protectors and Modules are marked to indicate the circuit breakrs with them are to be used.
a section control subtly are marked with a minimum and maximum dupply,
"Standby" Position, The Circuit Breaker is Marked to Indicate that the to Perform Work on load sign, and the circuit breaker must be in office, and that state is noting.
N3. General Markings-These Circuit Breakers Are Also Marked as Outlined for All Breakers. See items 1-30, 32-39, 41, and 43-45.
Ratings -All Ciruit Breakers Provided with Accessories Are Marked to Identify The Accessories Installed. This Includes the Accessory Type, Either An AMPERERE or Pilot-Duty Rating. For Shunt Trip Accessories, Over-And Under-Voltage Trip Accessories and Electrical Operators, The Marking Also Includes ethher Amapes ampither Amper
Along with Instructures Indicating that the label should be attacated to the breaker when installed. Installation and wiring instances are also provided unautable.
And the Resistor’s Electrical Ratings.
Type Designation -All Circuit Breaker Adapters Are Marked with their Type Designation.
Manufacturer ’s name – all circuit breaker adapters are marked with the manuoFactureer’ s name, trademark or Other Recognized Means for Identifying the ManuFacturer.
Terminations-All Circuit Breaker Adapters Are Marked with their Wire Termination Information. See items 15-22.
Circuit Breaker -All Circuit Breaker Adapters Are Marked to Indicate the Breaker Which the YEY Are to Be user.
Circuit after Automatic Opening from Overload or Short Circuit. They are suitable for user on circuits where the Available Fault does not exceed 5000 a RMSMMMETRICAL.
Manufacturer ’s name – all circuit proterTors are marked with the manual’ s name, trademark or Other recography for identifying the manUFACTURER.
VOLTAGE RATING -All Circuit Protectors Are Marked with a Voltage Rating.
AMPERE RATING – All Circuit Protectors are marked with a curren rate.
Reset Instructor – All Circuit Protector are Marked with Instructor.
That Should be connected to it. The ampages of the wire should be as spiecified for 75 ° C.
General Markings-These Circuit Breakers are Also Marked as Outlined for Breakers. See items 1-7, and 14-21.
"Test" Function-The "Test" Switch on An Arc-Fault Circuit Interrupter is Marked to Identify its Purpose. When the testch is setRessed, A Signal that simulating of the Arc Such that the Arc Detection or Software is Caused the Simulated Arc and This Shior the Mechanis TO FUNCTION TONCTION TONCTION TONCTION.
Users can doubled the required instances.
General Markings-These Circuit Breakers are Also Marked as Outlined for All Breaker. See items 1-7, 14-21, 29, 31, and 39-42.
breaker and gfci.
SIMULED ARC and This Should Cauer the Mechanism to Function to Trip the Breaker.
The internet where users can download the required instances.
General Markings-These Devices are also marked as outline for all breakers. See 1-7, 14-21, 29, 31, and 39-42.
NO .______ PROVIDED with this circuit breaker. If additive information is necessary, contact [Classified Circuit Breaker Manurer’s name]. ""
And Corresponding Ul Certify (Listed) System Supply Characteristics Exceed The Maximum Values Indicated in the Composition List. One Copy of the Composition List is Provided With Each CirCuaker.
Surface of the circuit breaker.
General Markings-These Circuit Breakers are also Marked as outlined for all breakers. See items 1-7,14-21, 39-40, 42-44, 50-66 and 89-96.
VOLTAGE RATING – These Circuit Breakers are marked with a volide rating up to 1500 V dc maximumum
Temperature Rating -PV Circuit Breakers Are Marked "50 ° C."
Abbreviations are used: Copper (CU), solid (sol), stranded (str). be marked with the minimum size bus bar with white it can be using.
ETC.
General-These Devices are also marked as outlined for all breakers. See 1-7, 10-15, 17-19, 21-23, 27, 41, and 45.
W1. VOLTAGE RATING -These Circuit Breakers Are Marked with a Nominal Voltage Rating up to 1250 v dc maximum, and a maximum voltage rating up to 1500 v DC maximumum.
W2. BPS Marking – These Circuit Breakers are marked "Battery Power Supply" (OR "BPS").
W3. Multi-POLE PV Circuit Breakers-A Multi-POLE BPS Circuit Breaker is Marked with A Diagram and/Otbiage Detailing the Correctrical Connections.
W4. Ungrounded Systems only -BPS Circuit Breakers are intended for user on unGrounded systems only, and are marked to indicated this lawation.
W5. General-These devices are also marked as outlined for all breakers. See 1-7, 10-15, 17-29, 38, 43, and 45.
Order Location Code May Be Used for a Marking.
Location Codes – The local codes are:
A – The marking is visible with removing the trim or cours.
B -The Marking is visible withded disassesmbling the device, when the trim or enclosure is removed, and may be visible with the trim or coupler in places.
C -The Marking May Be on Any Convenient Location Excet The Rear of the Breaker.
D -The Marking NEED only be visible after removal of the cb Frame Cover, or the equivalent.
E -The "Tripped" or "Reset" Markings are not required on the breaker if the receiving device is so marked.
F – For ElectricLly Operating Breakers, The "On" and "OFF" Markings are not required on the breaker if the electrical operator is so marked.
G -The "Part Replacement" Marking Does Not Note when Visible When the Removable PART Is Installed.
H – The Marking is visible when the wire connector dc molded case breaker is in place.
I – The Fuse or Protector Identification is to be visible when the cover over the fruTor comprtment is removed.
J – The marking or information may be shipped with the breaker.
K-for Breakers 1-1/2 Inches Wide Per Pole or Less, The Marking May Be Located at Any Convenient Location Except the Rear of the Breaker.
The following gives the marking and associated local.