UL 1007 vs UL 1015 vs UL 1061 Wire: What’s the Difference?
Compare AWM Style 1007, 1015 and 1061 by voltage, temperature, conductor range, insulation construction, outside-diameter implications and OEM wire-harness requirements.
UL 1007, UL 1015 and UL 1061 are common industry shorthand for AWM Styles 1007, 1015 and 1061. Style 1007 and Style 1061 are both 80°C, 300 Vac constructions, but Style 1061 uses thinner SRPVC insulation. Style 1015 permits higher voltage and temperature ratings and uses a thicker PVC insulation construction at common overlapping conductor sizes. The correct choice depends on electrical, mechanical, manufacturing and end-product requirements—not rating alone.
Three Styles at a Glance
The headline ratings are only part of the difference.
Key Takeaways
Same AWG does not mean the same wire construction—or the same fit in a harness.
AWM Style 1007 is an 80°C, 300 Vac PVC-insulated single-conductor construction.
Style 1015 permits higher voltage and temperature ratings and uses thicker PVC insulation at common overlapping sizes.
Style 1061 shares the 80°C / 300 Vac headline rating of 1007 but uses thinner SRPVC insulation.
Insulation construction affects finished outside diameter, terminal support, seals, routing and bundle size.
A higher voltage or temperature rating does not automatically make a wire a better or approved substitute.
Current manufacturer certification and product data should be checked before production material is released.
01 · Quick Comparison
UL 1007 vs UL 1015 vs UL 1061: Quick Comparison
The fastest way to understand the three wire Styles is to compare their published AWM construction requirements.
| Feature | AWM Style 1007 | AWM Style 1015 | AWM Style 1061 |
|---|---|---|---|
| Construction | Single conductor | Single conductor | Single conductor |
| Insulation | Extruded PVC | Extruded PVC | Extruded SRPVC |
| Temperature | 80°C | 80°C, 90°C or 105°C depending on certified product | 80°C |
| Voltage | 300 Vac | 600 Vac or 750 Vdc | 300 Vac |
| Conductor Range | 32–16 AWG | 30 AWG–2000 kcmil | 30–14 AWG |
| Conductor | Solid or stranded | Solid or stranded | Solid or stranded |
| Min. Average Insulation | 15 mil | 30 mil for 30–9 AWG; increases at larger conductor sizes | 9 mil |
| Min. at Any Point | 13 mil | 27 mil for 30–9 AWG; increases at larger conductor sizes | 7 mil |
| Flame | Horizontal flame | Horizontal flame | Horizontal flame |
| AWM Standard | UL 758 | UL 758 | UL 758 |
Style 1015 temperature and voltage values describe options permitted by the Style definition; the actual rating of a commercial wire should be confirmed from its current certification and manufacturer data.
32–16 AWG, solid or stranded conductor.
*Actual certified temperature must be checked for the product. Minimum insulation thickness increases above 9 AWG.
30–14 AWG with specific protected internal-wiring use conditions.
Insulation material and thickness can change finished outside diameter, routing space, stripping setup, terminal insulation support, seal compatibility and total harness bundle size.
02 · Terminology
What Do “UL 1007,” “UL 1015” and “UL 1061” Actually Mean?
The terms UL 1007, UL 1015 and UL 1061 are widely used in catalogs, drawings and purchasing conversations.
More precisely, they refer to:
- AWM Style 1007
- AWM Style 1015
- AWM Style 1061
Each is an Appliance Wiring Material construction under UL 758.
AWM Style 1007, 1015 and 1061 are different wire constructions—not three separate UL standards and not three names for the same hook-up wire.
In SEO and everyday sourcing language, terms such as “UL1007” and “UL1015” remain common. In an engineering specification, however, AWM Style 1007 or AWM Style 1015 is the more precise terminology.
UL Hook-Up Wire Review wire gauge, AWM Style, insulation, voltage, temperature, color and OEM preparation requirements. →03 · Style 1007
UL 1007 Wire Specifications
AWM Style 1007 is a single-conductor construction using extruded PVC insulation.
UL's published Style definition specifies:
- 80°C
- 300 Vac
- 32–16 AWG
- Solid or stranded conductor
- Extruded PVC insulation
- 15 mil minimum average insulation thickness
- 13 mil minimum thickness at any point
- Horizontal flame
- UL 758 Appliance Wiring Material
Style 1007 may be used where an 80°C / 300 Vac PVC AWM construction, its conductor range and its physical characteristics meet the approved end-product requirements.
Compared with Style 1061, the published Style 1007 construction requires thicker minimum insulation. Compared with Style 1015 at common overlapping conductor sizes, it requires thinner minimum insulation.
Style 1007 is not defined only by its 300 Vac / 80°C rating. Its PVC insulation construction and minimum thickness are also part of the Style definition.
04 · Style 1015
UL 1015 Wire Specifications
AWM Style 1015 is also a single-conductor PVC-insulated construction, but it permits higher voltage and temperature ratings and covers a much broader conductor-size range.
The published Style definition includes:
- 80°C, 90°C or 105°C depending on the certified product
- 600 Vac or 750 Vdc
- 30 AWG through 2000 kcmil
- Solid or stranded conductor
- Extruded PVC insulation
- Horizontal flame
- UL 758 Appliance Wiring Material
Style 1015 Insulation Thickness Changes With Conductor Size
Style 1015 does not have one fixed insulation thickness across its complete conductor range.
| Conductor Size | Minimum Average Thickness | Minimum at Any Point |
|---|---|---|
| 30–9 AWG | 30 mil | 27 mil |
| 8–7 AWG | 45 mil | 40 mil |
| 6–2 AWG | 60 mil | 54 mil |
| 1–4/0 AWG | 80 mil | 72 mil |
| 250–500 kcmil | 95 mil | 86 mil |
| 550–1000 kcmil | 110 mil | 99 mil |
| 1100–2000 kcmil | 125 mil | 112 mil |
Style 1015 allows higher voltage and temperature ratings than Styles 1007 and 1061, depending on the certified product, and uses a substantially thicker PVC insulation construction at common overlapping conductor sizes.
That higher-rated construction does not make Style 1015 universally better. It makes it a different wire construction that may also have different mechanical implications.
05 · Style 1061
UL 1061 Wire Specifications
AWM Style 1061 is a single-conductor construction using extruded SRPVC insulation and a thinner minimum insulation construction than Styles 1007 and 1015 at overlapping conductor sizes.
Its published Style definition specifies:
- 80°C
- 300 Vac
- 30–14 AWG
- Solid or stranded conductor
- Extruded SRPVC insulation
- 9 mil minimum average insulation thickness
- 7 mil minimum thickness at any point
- Horizontal flame
- UL 758 Appliance Wiring Material
The published Style use language also places Style 1061 in protected internal applications, including electronic equipment when the wire is within a chassis or otherwise protected from mechanical injury.
Style 1061 is a distinct AWM construction with its own insulation system, conductor range and published use conditions. Its thinner insulation should not be treated as an automatic substitute for Style 1007.
06 · Primary Comparison
UL 1007 vs UL 1015: What Is the Main Difference?
For the primary UL 1007 vs UL 1015 comparison, four differences matter most.
AWM Style 1007
- 80°C
- 300 Vac
- PVC insulation
- 15 mil minimum average insulation
- 32–16 AWG
AWM Style 1015
- 80°C, 90°C or 105°C depending on product certification
- 600 Vac or 750 Vdc
- PVC insulation
- 30 mil minimum average for 30–9 AWG
- 30 AWG–2000 kcmil
The higher voltage and temperature capability of Style 1015 is easy to see. The less obvious difference is the insulation construction.
At overlapping small conductor sizes, the Style 1015 definition requires substantially more minimum insulation thickness than Style 1007.
Style 1015 is not simply a “better Style 1007.” It is a different wire construction intended to satisfy different electrical, thermal and physical requirements.
07 · Thin-Wall Comparison
UL 1061 vs UL 1007: What Is the Main Difference?
The UL 1061 vs UL 1007 comparison is particularly useful because their headline electrical ratings are the same.
| Feature | Style 1007 | Style 1061 |
|---|---|---|
| Temperature | 80°C | 80°C |
| Voltage | 300 Vac | 300 Vac |
| Insulation | PVC | SRPVC |
| Min. Average Insulation | 15 mil | 9 mil |
| Min. at Any Point | 13 mil | 7 mil |
| Conductor Range | 32–16 AWG | 30–14 AWG |
Style 1007 and Style 1061 share 80°C and 300 Vac ratings, but Style 1061 uses a thinner SRPVC insulation construction and has different published use conditions.
08 · Construction Comparison
UL 1015 vs UL 1061
Style 1015 and Style 1061 differ more substantially.
Style 1015
- Allows higher voltage rating
- Allows higher temperature ratings
- PVC insulation
- Thicker insulation construction
- Very broad conductor-size range
Style 1061
- 80°C
- 300 Vac
- SRPVC insulation
- 9 mil minimum average insulation
- Protected internal-use conditions
Style 1015 therefore uses a higher-rated, thicker PVC construction, while Style 1061 uses a thinner SRPVC construction with 80°C / 300 Vac ratings.
09 · Mechanical Impact
How Insulation Thickness Affects Finished Wire OD
Insulation thickness is one of the most practical differences between Style 1007, Style 1015 and Style 1061.
Conceptual Minimum Average Insulation Comparison
Visual comparison only — not to scale to actual finished wire outside diameter.
*30 mil minimum average applies to Style 1015 conductor sizes from 30 through 9 AWG under the published Style definition. Larger Style 1015 conductor sizes require greater minimum insulation thickness.
These minimum insulation values help explain why the three Styles can have different finished outside diameters (OD) even when conductor gauge is the same.
They do not, however, provide the exact finished OD of every commercial product.
Actual wire OD can also depend on:
- Conductor strand construction
- Actual conductor diameter
- Manufacturing tolerances
- Insulation process
- Manufacturer-specific product design within the Style requirements
Minimum insulation thickness helps explain why the Styles tend to produce different finished diameters, but exact OD should be taken from the manufacturer's current product data.
Wire OD can affect terminal insulation-grip range, wire seals, connector rear cavities, grommets, sleeve fill, bundle diameter, routing space and stripping setup.
10 · Substitution
Can UL 1007, UL 1015 and UL 1061 Be Substituted for Each Other?
Not automatically.
A wire should not be approved as a substitute simply because it has:
- The same AWG
- The same conductor material
- The same color
- An equal or higher voltage rating
- An equal or higher temperature rating
A proper substitution review should also consider:
Matching AWG does not make Style 1007, 1015 and 1061 interchangeable.
For example, Style 1015 may offer higher electrical ratings than Style 1007, but a larger finished OD may affect an existing terminal, seal, connector cavity or harness routing space.
11 · Selection
Which Wire Is Better: UL 1007, UL 1015 or UL 1061?
There is no universally best Style.
Style 1007 May Be Appropriate When
The approved design requires an 80°C / 300 Vac PVC AWM construction and the Style's conductor range, finished dimensions and end-product requirements are suitable.
Style 1015 May Be Appropriate When
The project requires higher voltage or temperature capability, a conductor size outside the Style 1007 or Style 1061 ranges, or the specified heavier PVC construction.
Style 1061 May Be Appropriate When
The approved end-product design permits its 80°C / 300 Vac SRPVC construction and its thinner insulation is appropriate for protected internal wiring where package space matters.
The correct Style should be selected from the end-product requirements, not simply from which Style has the highest printed voltage or temperature rating.
12 · Higher Rating ≠ Better Fit
Why a Higher Voltage Rating Does Not Automatically Mean Better
It is easy to look at Style 1015 and conclude that a 600 Vac wire must always be better than a 300 Vac Style 1007 wire.
That is too simplistic.
A higher rating is valuable when the end product requires it. If the additional electrical or thermal capability is unnecessary, however, the different construction may create mechanical changes without solving an actual design requirement.
A larger wire OD can affect:
- Connector packaging
- Terminal insulation support
- Wire seals
- Routing
- Bend behavior
- Harness bundle size
- Available installation space
A higher-rated wire is not automatically the better choice if its additional insulation diameter or construction is unnecessary for the application.
The goal is not to maximize every rating. It is to select a wire construction that satisfies all required electrical, mechanical, manufacturing and end-product conditions.
13 · Manufacturing Impact
How These Styles Affect Wire Harness Manufacturing
Wire Style is not only an electrical specification. It is also a manufacturing variable.
Cutting and Stripping
Different insulation materials and thicknesses can require different stripping settings, blades or process conditions.
Crimping
The conductor must fit the terminal conductor barrel, while the insulated portion must also fit the intended insulation-support range where applicable.
Wire Seals
Sealed connector systems often use seals designed for defined wire OD ranges. A Style change can therefore affect seal fit even when the conductor gauge remains unchanged.
Routing and Bundle Diameter
Thicker insulated wire can require more routing space. In a harness containing many circuits, small OD differences can accumulate into a meaningful change in total bundle diameter.
Wire Style is a manufacturing variable as well as an electrical specification.
When these wires are processed into a Wire Harness , the Style should therefore be reviewed together with the terminal, connector, seal, drawing, routing and production requirements.
Design & Engineering Review wire specifications, terminals, connectors, drawings, BOM files and manufacturability before a material substitution is approved. →14 · OEM Documentation
What Should Be Specified on the Drawing or BOM?
A controlled OEM wire specification should identify more than “UL wire.”
| Item | What to Control |
|---|---|
| AWM Style | 1007, 1015, 1061 or another required Style. |
| AWG | Required conductor size. |
| Conductor Construction | Solid or stranded, with further detail where required. |
| Insulation | Required material and construction. |
| Color | Circuit identification. |
| Voltage Requirement | Electrical requirement of the end product. |
| Temperature Requirement | Thermal requirement of the end product. |
| Manufacturer | Approved material source where controlled. |
| Approved Alternative | Defines substitution and change-control limits. |
| Terminal | Must match conductor and insulation dimensions. |
| Wire Length | Manufacturing requirement. |
| Revision | Approved production configuration. |
If a BOM calls for AWM Style 1007, Style 1015 should not automatically replace it simply because the published voltage or temperature capability is higher.
Likewise, Style 1061 should not automatically replace Style 1007 only because its insulation construction is thinner.
The BOM Preparation Guide can help organize wire, terminal, connector and approved-alternative information.
The Drawing & Wiring Diagram Guide covers wire definitions, connections, dimensions and other production information.
15 · Common Mistakes
Common UL 1007 / 1015 / 1061 Selection Mistakes
Assuming Style 1015 Is Always Better Because Its Ratings Are Higher
Higher ratings do not automatically make a wire more appropriate for an existing mechanical design.
Assuming Style 1007 and Style 1061 Are the Same
Both are 80°C / 300 Vac Styles, but their insulation material, minimum thickness and published use conditions differ.
Comparing Only AWG
AWG describes conductor size, not the complete insulated-wire construction.
Ignoring Insulation Thickness
Insulation thickness can affect finished OD, routing space and termination compatibility.
Ignoring Terminal and Seal OD Ranges
An electrically suitable replacement may still be mechanically unsuitable.
Assuming a Higher-Rated Style Is an Automatic Approved Substitute
The drawing, BOM, customer requirements and end-product definition still control the material.
Treating UL 1007, UL 1015 and UL 1061 as Separate Standards
They are AWM Style numbers under UL 758 rather than three independent UL standards.
16 · Verification
How Should Current Style and Product Certification Be Verified?
UL's public Style 1007, 1015 and 1061 pages remain useful for understanding the historical published construction definitions.
However, those pages now explicitly state that they are no longer being updated and are provided for historic reference only.
Current certification for a specific wire should be confirmed using current UL Product iQ information and the manufacturer's current technical documentation rather than relying only on a historic Style page.
For an OEM sourcing decision, confirm:
- Required AWM Style
- Actual wire manufacturer
- Manufacturer part number
- Current technical datasheet
- Applicable UL certification record
- Conductor size and construction
- Actual finished outside diameter
- Certified voltage and temperature ratings
- Applicable use conditions
- Customer-approved substitution requirements
Use the Style definition to understand the construction, but verify the actual manufacturer's current product before releasing material for production.
17 · Official References
Official UL Style References
Conclusion
Choose the Wire Construction That Fits the End Product
UL 1007, UL 1015 and UL 1061 are commonly grouped together as hook-up wire options, but they are not interchangeable versions of the same product.
Their most important differences are:
Style 1007:
80°C / 300 Vac / PVC / 15 mil minimum average insulation.
Style 1015:
80°C, 90°C or 105°C depending on certified product / 600 Vac or 750 Vdc / PVC / 30 mil minimum average insulation for 30–9 AWG, increasing at larger conductor sizes.
Style 1061:
80°C / 300 Vac / SRPVC / 9 mil minimum average insulation.
The Style 1007 vs Style 1015 decision is therefore about more than choosing between 300 V and 600 V.
Likewise, Style 1007 vs Style 1061 is not a comparison between two identical 80°C / 300 V wires. Their insulation construction and published use conditions differ.
Matching AWG does not make Style 1007, Style 1015 and Style 1061 interchangeable. The correct Style should be selected from the end-product requirements, not simply from which Style has the highest printed rating.
For an OEM wire harness or internal-equipment wiring project, the specification should control the required AWM Style, conductor size, insulation construction, terminal compatibility, manufacturer or approved alternative, and drawing or BOM revision before production begins.
Frequently Asked Questions
UL 1007 vs UL 1015 vs UL 1061 FAQ
Quick answers about voltage, temperature, insulation thickness, Style differences and wire substitution.
What is the difference between UL 1007 and UL 1015?
AWM Style 1007 is an 80°C, 300 Vac PVC construction with 15 mil minimum average insulation thickness. Style 1015 permits 80°C, 90°C or 105°C ratings depending on the certified product, and 600 Vac or 750 Vdc, with 30 mil minimum average PVC insulation for 30–9 AWG and greater thickness at larger conductor sizes.
Is UL 1015 better than UL 1007?
Not universally. Style 1015 allows higher voltage and temperature ratings, but its thicker insulation construction can also increase wire outside diameter. The better choice is the Style that meets the approved electrical, mechanical and end-product requirements.
What is the voltage rating of UL 1007 wire?
AWM Style 1007 is rated 300 Vac in UL's published Style definition.
What is the voltage rating of UL 1015 wire?
AWM Style 1015 permits a rating of 600 Vac or 750 Vdc under UL's published Style definition. The actual certified product should be checked before use.
What is UL 1061 wire?
AWM Style 1061 is a single-conductor SRPVC-insulated construction rated 80°C and 300 Vac, with a published conductor range of 30–14 AWG and 9 mil minimum average insulation thickness.
What is the difference between UL 1007 and UL 1061?
Both Styles are rated 80°C and 300 Vac, but Style 1007 uses PVC with 15 mil minimum average insulation thickness, while Style 1061 uses SRPVC with 9 mil minimum average insulation. Their conductor ranges and published use conditions also differ.
Is UL 1061 thinner than UL 1007?
The published Style construction requires thinner minimum insulation for Style 1061: 9 mil minimum average compared with 15 mil for Style 1007. Exact finished outside diameter still depends on the manufacturer's actual conductor and product construction.
Can UL 1015 replace UL 1007?
Not automatically. Even though Style 1015 allows higher voltage and temperature ratings, it has a different insulation construction and may have a larger finished outside diameter. Terminal fit, seals, routing space, drawing requirements and end-product approval should be reviewed before substitution.
Are UL 1007, UL 1015 and UL 1061 AWM Styles?
Yes. More precisely, they are AWM Style 1007, Style 1015 and Style 1061 under UL 758 Appliance Wiring Material.
Which Style is best for a wire harness?
There is no universal best Style. The correct choice depends on the required voltage, temperature, conductor size, insulation construction, finished outside diameter, terminal and seal compatibility, routing space and approved end-product specification.
Need UL 1007, UL 1015 or UL 1061 Wire for an OEM Project?
Send your AWM Style, wire gauge, conductor and insulation requirements, color, terminal or connector information, length, drawing, BOM and quantity. We can review the wire specification together with your internal wiring or wire-harness requirements.