Power Cord Comparison
Power Cord Comparison
Power cords are among the most overlooked components of surge protectors, power strips, relocatable power taps, and uninterruptible power supplies. While marketing materials frequently emphasize surge ratings, outlet counts, and protection features, the power cord itself often provides valuable information regarding manufacturing practices, construction quality, safety certifications, and component sourcing.
The OldSurge Archive documents cord type, conductor size, manufacturer markings, approval identifiers, and related construction details whenever possible. Comparing cords across multiple products can reveal long-term trends in the power-protection industry, including changing wire gauges, common third-party cord suppliers, manufacturing locations, and evolving product designs.
Early observations suggest that 14 AWG SJT cord assemblies remained common across a wide range of surge protectors and relocatable power taps from the late 1980s through at least 2009. Examples documented by the OldSurge Archive include products manufactured by Tripp Lite, APC, PowerSentry, ACE, and Universal. Multiple third-party cord suppliers have been identified, including Bon-Eagle, Apollo, and Baohing.
Documented 16 AWG SJT examples presently appear primarily among lighter consumer-oriented surge protectors.
Overview
Most power-protection products utilize flexible power cords identified by standardized designations such as:
- SJT
- SJTW
- SVT
These markings provide information regarding conductor count, insulation type, voltage rating, flexibility, and intended service conditions.
The majority of products currently documented by the archive utilize SJT cordage, reflecting its widespread use in consumer and office electrical products throughout the 1990s and 2000s.
Common Cord Types
| Cord Type | Meaning | Typical Use |
|---|---|---|
| SJT | Junior Hard Service Thermoplastic Cord | Surge protectors, power strips, office equipment |
| SJTW | Junior Hard Service Thermoplastic Weather-Resistant Cord | Outdoor-capable products, extension cords |
| SVT | Vacuum Cleaner Cord | Light-duty appliances and consumer products |
Documented Cord Manufacturers
The following manufacturers have been identified through markings visible on products documented by the archive:
- Bon-Eagle
- APC PRO7 (1994, 1996)
- Universal 71637 (1998)
- PowerSentry 626 (2002)
- Apollo
- Universal 71641 (2004)
- Baohing
- APC PRO7 (2008)
- Unknown (Belkin-branded)
- Belkin SurgeMaster F9H710-06 (2003)
Additional manufacturers will be added as more products are documented.
Conductor Gauge Comparison
| Product | Year | Cord Manufacturer | Cord Type | Conductors | Wire Size |
|---|---|---|---|---|---|
| Tripp Lite SPIKE BAR SK6-6 | ≤ Nov 1989 | Unknown | SJT | 3 | 14 AWG |
| APC SurgeArrest Professional PRO7 (Z94030204087) | 1994 | Bon-Eagle | SJT | 3 | 14 AWG |
| APC SurgeArrest Professional PRO7 (Z96030204796) | 1996 | Bon-Eagle | SJT | 3 | 14 AWG |
| Universal 71637 | 1998 | Bon-Eagle | SJT | 3 | 14 AWG |
| PowerSentry 626 | 2002 | Bon-Eagle | SJT | 3 | 14 AWG |
| Belkin SurgeMaster F9H710-06 | 2003 | Unknown (Belkin-branded) | SJT | 3 | 14 AWG |
| Universal 71641 (Yellowed Example) | 2004 | Apollo | SJT | 3 | 16 AWG |
| Universal 71641 (Lightly Yellowed Example) | 2004 | Apollo | SJT | 3 | 16 AWG |
| APC SurgeArrest Professional PRO7 (4Z0842P07546) | 2008 | Baohing | SJT | 3 | 14 AWG |
| ACE 33543 Relocatable Power Tap | 2009 | Unknown | SJT | 3 | 14 AWG |
UL and CSA File Numbers
Power cords frequently carry independent UL and CSA approvals in addition to the certifications applied to the finished product.
Examples documented by the archive include:
| Product | UL File Number | CSA File Number |
|---|---|---|
| APC SurgeArrest Professional PRO7 (Z94030204087) | E135710 | LL152727 |
| APC SurgeArrest Professional PRO7 (Z96030204796) | E135710 | LL152727 |
| Universal 71637 | E135710 | LL95737 |
| PowerSentry 626 | E135710 | LL95737 |
| Belkin SurgeMaster F9H710-06 | E177638 | Unknown |
| Universal 71641 (Yellowed Example) | E176194 | LL109777 |
| Universal 71641 (Lightly Yellowed Example) | E176194 | LL109777 |
| APC SurgeArrest Professional PRO7 (4Z0842P07546) | E159216 | Unknown |
| ACE 33543 Relocatable Power Tap | E177868 | LL109777 |
Archive Observations
Early observations suggest that heavier-duty surge protectors frequently utilized SJT 14/3 cord assemblies, while some later consumer-oriented designs utilized SJT 16/3 construction.
Bon-Eagle appears repeatedly among products documented by the archive, including APC, Universal, and PowerSentry examples manufactured between the 1990s and early 2000s. The recurring appearance of UL file number E135710 suggests widespread use of Bon-Eagle 14 AWG SJT cord assemblies across multiple product lines and manufacturers.
The 2008 APC SurgeArrest Professional PRO7 specimen documents a different supplier, Baohing, utilizing UL file number E159216. Comparison with earlier APC PRO7 specimens from 1994 and 1996 indicates that APC changed cord suppliers while retaining substantially similar 14 AWG SJT cord construction.
Documented examples currently suggest that manufacturers frequently sourced cord assemblies from third-party suppliers rather than producing cords internally. Additional documented examples may reveal broader industry trends involving conductor size, supplier relationships, manufacturing locations, and component standardization.
Documented examples utilizing Bon-Eagle cord assemblies currently span at least 1994 through 2002 production and include products manufactured by APC, Universal, and PowerSentry. The recurring appearance of Bon-Eagle markings suggests that the company's cord assemblies were widely used across multiple brands and product families within the consumer power-protection industry.
The 2003 Belkin SurgeMaster F9H710-06 utilizes a 14 AWG SJT cord assembly marked with UL file number E177638. Unlike several other documented products, the jacket bears BELKIN SURGEMASTER branding and does not identify the underlying cord manufacturer. This may indicate a private-labeled cord assembly produced for Belkin by a third-party supplier.
Additional documented examples may eventually reveal broader industry trends involving conductor size, cord suppliers, manufacturing locations, and construction quality.
Documented Cord Markings
The following examples illustrate typical power-cord markings documented on surge protectors and power-distribution products preserved by the archive.
-
Bon-Eagle SJT 14/3 cord marking from Universal 71637. -
UL and CSA markings from Universal 71637 cord assembly. -
Bon-Eagle SJT 14/3 cord marking from APC PRO7 (1996). -
Bon-Eagle SJT 14/3 cord marking from PowerSentry 626. -
SJT 14/3 cord markings from ACE 33543 relocatable power tap. -
Apollo SJT 16/3 cord marking from Universal 71641. -
Baohing SJT 14/3 cord marking from APC PRO7 (2008). -
Baohing manufacturer marking from APC PRO7 (2008). -
Additional cord specifications from APC PRO7 (2008). -
Belkin SurgeMaster branded SJT 14/3 cord with no visible OEM manufacturer marking. -
UL E177638, SJT, VW-1, FT2, and 14 AWG cord markings from Belkin SurgeMaster F9H710-06.
Historical Notes
Power cords are often among the most durable and standardized components incorporated into power-protection products. Because cord markings frequently survive long after packaging and documentation have been discarded, they can provide important clues regarding manufacturing date, supplier relationships, certification history, and product lineage.
Cord manufacturers rarely receive attention in contemporary marketing materials, making surviving markings a useful source of information for reconstructing historical supply chains.