An Urgent Bulletin from CSA Group
Ref No: I15-050
Wire and Cable No. 202
Existing Certification not affected
Date: March 19, 2015
Apply any time to have your products evaluated
Announcing: Publication of List of Technical Requirements (LTR) J-006-2015 - Flexible/Decorative Cord, Single Wire
Class No: 5831 01, WIRES - Flexible Cord
To purchase the Standard, visit us at www.shop.csa.ca
Manufacturers of decorative lighting strings.
certification record to allow the manufacture of single
conductor CXWT and ship directly to manufacturers of
decorative lighting strings.
What do you do?
Background and Rationale:
1. This publication outlines certification revisions
that do not affect your currently certified product
designs.
CXWT is a dual wire, twisted construction used in the
manufacture of decorative light strings in accordance
with CSA C22.2 No. 37 – Decorative lighting
Products. The light string is made in series-parallel
construction with dual wires. One wire is cut to the full
length of the light strings while the second length is
cut into shorter segments approximately 15 cm (6 in.)
long onto which the lamp holders are attached. A
single wire is required to facilitate the manufacture of
such light strings.
Who is affected?
2. Please contact CSA technical staff if you have
questions or need information concerning this
publication and how it applies to you.
3. If you would like to arrange for an evaluation of
new products to the revisions, initiate a
certification project by contacting our Client
Services Centre at 1-866-797-4272. Please
supply appropriate supporting documentation*. If
testing is needed, we will inform you of the
samples required.
*which includes technical information, company
name, address, factory locations and CSA file
number or master contract number (if assigned), and
any other relevant documentation.
Approvals:
This LTR is being issued to allow the wire
manufacturers to produce single conductor CXWT
and ship directly to lighting manufacturers.
Major Revisions:
This LTR shall be used in conjunction with the CSA
standard for Flexible cords and cables, C22.2 No. 4914, except for the modified clauses and table as
shown in the attached LTR. This LTR will be
withdrawn upon publication of the revised standard.
Customers who currently hold CSA certification for
CXWT may apply at any time to update their
For questions specific to your file or products contact your CSA Group
technical staff associate.
Go to http://www.csagroup.org/us/en/services/testing-andcertification/certified-product-listing and enter your Master Contract
# and the class numbers associated with this Informs to view your
certified products.
For technical questions on this Informs
Contact Evangeline Cometa
by phone 416.747.2671, fax 416.747.4149
or e-mail [email protected]
Visit us at www.csagroup.org Click on "Contact Us" for the online phone listing of our Offices and Partners
DQD 529.02 Rev 2012-03-10
© The Canadian Standards Association.
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All rights reserved.
Page 1 of 6
ATTACHMENT 1
List of Technical Requirements [LTR]
Wire and Cable Group
LTR Number
J-006-2015
Subject – Keywords
Flexible cord, Decorative cords, single wire CXWT
Background & Rationale
CXWT is a dual wire, twisted construction used in the manufacture of decorative light strings in accordance
with C22.2 No. 37-Decorative Lighting Products. Each light is made in series-parallel construction with dual
wires. One wire is cut to the full length of the light string while the second length is cut into shorter
segments approximately 6 in. long into which the lamp holders are attached. When the lamp holders have
been attached to the segmented wires, it is then paired with a continuous wire and then twisted together. A
single wire CXWT is required to facilitate the manufacture of the light strings without having to untwist the
wire first at the factory. The untwisting adds additional handling that could compromise the integrity of the
cable. Therefore, a single conductor CXWT is desired where it is shipped directly to the manufacturer of
the decorative light string.
Technical Issue
This LTR will be used to supplement C22.2 No. 49-14 – Flexible cords and cables,. It is being issued to
enable decorative lighting manufacturers to produce wire strings using CXWT in accordance with the new
edition of C22.2 No. 37-14. This LTR will be withdrawn upon publication of the amended standard, C22.2
No. 49.
Technical Requirements
This LTR shall be used in conjunction with CSA C22.2 No. 49-14 except for the modified clauses and table
as shown below.
Reference class description: 5831 01 Flexible cord
Requirements
Cl. 4.1.4.1
Lay of conductors
4.1.4.1.1
Flexible cords with cabled conductors shall have the individual conductors twisted together
with a length of lay not greater than that shown in Table 10. When cords covered in Table 10 have mixed
conductor sizes, the lay shall be based on the number of conductors and the largest conductor size found
in the cord. Constructions not covered in Table 10 shall have the individual conductors laid up so that the
lay shall be not more than 15 times the overall diameter of the conductor assembly. For CXTW u, twisted
CXWTc, and TXc, the lay shall not be more than 30 times the overall diameter of the insulated conductor.
For multiple layer cords, the conductors in each layer shall be twisted, but the lay is not specified, except
that in the outer layer the lay shall be not more than 15 times the overall diameter of that layer.
DQD 529.02 Rev 2012-03-10
Copyright  CSA Group – All rights reserved
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6.4.4
In Canada and the United States, the following applies. The tag, reel, or carton shall
show the following information:
a)
“For use in general use extension cord sets only” for Types SPE-2u and SPT-2
cords having conductors composed of 0.166 mm to 0.260 mm (0.066 in to
0.010 in) wires; and
b)
“Not for sale to the general public”
(i) For types CXWTc (single conductor construction only), TXc, PXTc,
shaver cordsu, clock cordu, TPT, TST; and…
Table 2
Stranding
(See Clauses 4.1.1.7.1 and 4.4.1.2.)
Diameter of individual wires
Conductor
size
Cord or cable type
m
SPT-0
c
u
CXWT , CXTW , XTW
m,u
u
u
c,u
SP-1 *, SP-2 , SPT-1*, SPT-2, SPT-1W , SPTc,u
2W , SVT, SVTO, SVTOO, SV, SVO, SVOO, HPN,
u
HSJ, HSJO, HSJOW, HSJOO, HSJOOW, HPD ,
u
u
u
u
u
SPE-1 *, SPE-2 , SVE , SVEO , SVEOO , NISPm,u
m,u
m,u
1 , NISP-2 , NISPT-1, NISPT-2, NISPE-1 ,
m,u
u
NISPE-2 , clock
Minimum
Maximum
mm
(in)
mm
(in)
0.325 mm
(22 AWG)
2
0.125
(0.0049)
0.260
(0.010)
0.325 mm
(22 AWG)
2
0.079
(0.0031)
0.165
(0.0065)
All sizes
0.125
(0.0049)
0.165
0.260
2
†
m
(0.0065)
m
(0.010 )
SJ, SJT, SJTO, SJTOO, SJO, SJOO, SJOW,
2.63 mm (13
SJOOW, S, SO, SOO, SOW, SOOW, SJTW,
AWG) and
SJTOW, SJTOOW, ST, STO, STOO, STW, STOW,
smaller
m,u
c
c
u
STOOW, SP-3 , SPT-3, PXWT , CXWT , SJE ,
u
u
u
u
u
u
SJEW , SJEO , SJEOW , SJEOO , SJEOOW , SE , 3.312 – 33.6
u
u
u
u
u
u
mm (12 - 2
SEW , SEO , SEOW , SEOO , SEOOW , SPE-3 ,
m,u
m,u
AWG)
EVJ, EVJE , EVJT, EV, EVE , EVT
0.125
(0.0049)
0.260
0.125
(0.0049)
0.410
E, EO, ETT, ETP
All sizes
0.125
(0.0049)
0.260
(0.010)
20 - 18
AWG
0.125
(0.0049)
0.260
(0.010)
0.125
(0.0049)
0.260
(0.010)
u
CXTW , XTW
c
PXT , TX
u,c
u
c
2
0.325 mm
(22 AWG)
and 0.519
2
mm (20
AWG)
c
u
EV , EVT(TPE) , EVE , EVT
u,c
All other types (except hoistway cable)
‡
†
(0.010)
(0.016)
‡
1 - 2/0 AWG
Minimum 133 strands, strand size not specified
3/0 AWG –
500 kcmil
Minimum 259 strands, strand size not specified
2
0.125
(0.0049)
0.410
(0.016)
2
0.125
(0.0049)
0.821
(0.032)
4.17 mm (11
AWG) and
smaller
5.26 mm (10
AWG) and
§
larger
DQD 529.02 Rev 2012-03-10
Copyright  CSA Group – All rights reserved
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Diameter of individual wires
Conductor
size
Cord or cable type
Minimum
mm
m,u
Maximum
(in)
mm
u
(in)
2
* For SPT-1, SP-1 , and SPE-1 types, a composition of wires having sizes not smaller than that of 0.005 mm (40 AWG) for 0.519
2
mm (20 AWG) conductors shall be permitted.
2
2
2
† In Canada and the United States, the following applies. For 2 X 1.31 mm (16 AWG), 3 X 1.31 mm (16 AWG), 2 X 0.824 mm (18
2
u
AWG), and 3 X 0.824 mm (18 AWG) Type SPT-2 and SPE-2 flexible cords, a diameter of the individual wires in the conductors of
0.166 mm to 0.260 mm (0.0066 in to 0.010 in) shall be permitted when such cords are for use in extension cord sets other than
those with cord take-up reels. In Mexico, this is not applicable.
2
2
2
2
‡ Sizes 0.259 mm and 0.162 mm (23 AWG and 25 AWG) strands, respectively, shall be permitted for 33.6 mm and 21.2 mm (2
AWG and 4 AWG) size extra-hard-usage cords.
c
2
§ All conductors of Type DRT cable in sizes 5.26 mm (10 AWG) and larger shall be composed of not fewer than 49 strands,
2
except for sizes 3.31- 5.26 mm (12-10 AWG) grounding conductors; for these sizes, the grounding conductors may employ a
minimum of 7 strands
Table 22
Decorative cords
(See Clauses 4.3.1, 4.3.3.1, and 4.3.9.3 and Figure 2.)
Type
PXT
c
PXWT
c
c
TX
CXWT
c
CXWT
c
CXWT
c
m
SPT-0
Maximum
temperature,
°C
60
60
60
60
60
60
60, 75, 90, 105
Maximum
voltage, V
125
300
125
300
300
600
300
Size of
conductors,
2
mm (AWG)
0.325 and
0.519 (22
and 20)
0.325, 0.519,
0.824, and
1.31 (22, 20,
18, and 16)
0.519 (20)
2.08 and 3.31
(14 and 12)
0.325 (22)
Number of
conductors
2
2
2
2
2 or 3
0.325, 0.519, 0.325, 0.519,
0.824, and
0.824, and
1.31 (22, 20, 1.31 (22, 20,
18, and 16)
18, and 16)
2
1
Conductor:
Material
Soft annealed copper (Clause 4.1.1.2)
Size
Cross-sectional area and DC resistance (Clause 4.1.1.3.1)
Stranding
Size of wires (Clause 4.1.1.7.1), lay of wires (Clause 4.1.1.7.2)
General
Joints, coatings, separators (Clauses 4.1.1.4, 4.1.1.5, and 4.1.1.6)
Conductor
identification,
Clause
4.1.9
4.1.9
N/A
N/A
N/A
N/A
4.1.9
Maximum lay
of conductors,
Clause
N/A
N/A
4.1.4.1
4.1.4.1
N/A
4.1.4.1
N/A
4
4
4
4
4
4
4, 5, 6, 7
0.76 (30)*
1.14 (45)*
0.58 (23)
1.14 (45)
1.14 (45)
1.52 (60)
0.64 (25)*
Insulation
class
Minimum
average
thickness, mm
DQD 529.02 Rev 2012-03-10
Copyright  CSA Group – All rights reserved
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Type
PXT
c
PXWT
c
c
TX
CXWT
c
CXWT
c
CXWT
c
m
SPT-0
(mils)
Minimum
thickness
(before
separation for
parallel), mm
(mils)
0.69 (27)
1.02 (40)
0.45 (18)
1.02 (40)
1.02 (40)
1.37 (54)
0.58 (23)
Minimum
average
thickness (after
separation),
mm (mils)
0.33 (13)
1.02 (40)
N/A
N/A
N/A
N/A
0.28 (11)
Minimum web
thickness, mm
(mils)
1.14 (45)
2.16 (85)
N/A
N/A
N/A
N/A
0.96 (38) (2
conductors);
Assembly
0.58 (23) (3
conductors)
Parallel
integral
Parallel
integral
Twisted
Twisted
Single
Twisted
Parallel integral
Physical
properties,
insulation
5.1.1
5.1.1
5.1.1
5.1.1
5.1.1
5.1.1
5.1.1
Deformation
5.1.3
5.1.3
5.1.3
5.1.3
5.1.3
5.1.3
5.1.3
Spark test
5.2.1
5.2.1
5.2.1
5.2.1
5.2.1
5.2.1
5.2.1
Dielectric
strength
5.2.2
5.2.2
N/A
5.2.2
5.2.2
5.2.2
5.2.2
Continuity
5.2.7
5.2.7
5.2.7
5.2.7
5.2.7
5.2.7
5.2.7
Flame FT2
5.1.5.3
5.1.5.3
5.1.5.3
5.1.5.3
5.1.5.3
5.1.5.3
5.1.5.3
Flame VW-1
(optional)
5.1.5.4
5.1.5.4
5.1.5.4
5.1.5.4
5.1.5.4
5.1.5.4
5.1.5.4
Flame FT1
(optional)
5.1.5.1
5.1.5.1
5.1.5.1
5.1.5.1
5.1.5.1
5.1.5.1
5.1.5.1
FT4 (optional)
5.1.5.2
5.1.5.2
5.1.5.2
5.1.5.2
5.1.5.2
5.1.5.2
5.1.5.2
Cold bend
5.1.6
5.1.6
5.1.6
5.1.6
5.1.6
5.1.6
5.1.6
Weather
resistance
N/A
5.1.7
N/A
5.1.7
5.1.7
5.1.7
N/A
Durability of
print
5.1.12
5.1.12
5.1.12
5.1.12
5.1.12
5.1.12
5.1.12
Heat-shock
resistance
5.1.8
5.1.8
5.1.8
5.1.8
5.1.8
5.1.8
5.1.8
Insulation
resistance
5.2.3
5.2.3
5.2.3
5.2.3
5.2.3
5.2.3
5.2.3
Permittivity and
stability factor
N/A
5.2.4
N/A
5.2.4
5.2.4
5.2.4
N/A
Conductor
5.2.8
5.2.8
5.2.8
5.2.8
5.2.8
5.2.8
5.2.8
Tests, Clause:
DQD 529.02 Rev 2012-03-10
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Type
PXT
c
PXWT
c
TX
c
CXWT
c
CXWT
c
CXWT
c
m
SPT-0
corrosion
Tightness of
insulation
5.1.10
5.1.10
N/A
5.1.10
5.1.10
5.1.10
5.1.10
Application
Indoor
Outdoor
Indoor
Outdoor
Outdoor
Outdoor
Indoor
* This value is provided for information only. It is not a requirement.
CSA
(X)
NRTL
()
CB
()
This LTR is applicable to the following programs ()
Others:
()
Impact on Existing Certification
None.
Experts Consulted
Distribution of this
LTR
Mark Blaire, Richard Cohen,
Mark Blaire, Richard Cohen, Kim Nguyen, Edward Lorenco, Stanko
Todoric, Iuliana Nita, Aida Poon, Scott Hall, Rick Hobbs, Calvin
McKenzie, Simon Liang, Sam Gu, Himson Guan, Avery Yearwood,
TM.
This LTR was issued by TA/TM on
2015
03
19
This LTR replaces previous LTR dated
yyyy
mm
dd
If you require additional technical information, please contact:
Evangeline Cometa
(416) 747-2671[Phone]
(416) 401-6893 [Fax]
[email protected] [E-mail]
Copyright  CSA Group – All rights reserved
DQD 529.02 Rev 2012-03-10
Copyright  CSA Group – All rights reserved
I:\Wgm4\DOC_CTRL\Informs\T-W\WireandCable201.doc
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