1. What is a RHH Cable?
RHH stands for Rubber-insulated Heat-resistant, a type of single-conductor wire designed for use in dry locations with excellent thermal performance. RHH kabel typically features:
A copper conductor (solid or stranded)
A thermoset rubber insulation (such as EPDM or EPR)
Rated up to 600 volts
Operating temperature of up to 90°C
These cables are widely used in applications where heat resistance, flame resistance, and physical durability are crucial.
2.Key Features of RHH Cables
RHH cables are engineered for high-performance and long-term reliability in demanding electrical environments. Whether you're working on a commercial panel using 1AWG RHH cable or need the increased ampacity of RHH cable 2/0, the following key features make RHH cables a preferred choice:
High Temperature Resistance
Rated up to 90°C in dry environments, RHH cables maintain performance even under elevated ambient temperatures.
Robust Rubber Insulation
The thermoset rubber insulation provides excellent resistance to abrasion, heat, and aging, making RHH cable ideal for indoor conduit and panel use.
Flame-Retardant Properties
RHH cables are designed to meet stringent flame resistance standards, enhancing fire safety in residential, commercial, and industrial applications.
Flexible and Easy to Install
Despite their toughness, both 1AWG RHH cable and RHH cable 2/0 offer sufficient flexibility for tight bends and compact routing in conduit systems.
Code-Compliant and UL-Approved
All RHH cables comply with UL 44 and NEC guidelines, ensuring safe and approved usage in critical wiring systems.
Versatile for Various Loads
Use 1AWG RHH cable for moderate power needs and RHH cable 2/0 for high-capacity circuits such as main feeders, subpanels, or heavy machinery.
With a proven track record in dry-location applications, RHH kabel delivers durability and performance where it matters most-making it a smart investment for both new installations and system upgrades.
3.Common Applications of RHH Cable
RHH cable is widely used in electrical systems that demand reliable performance in dry, controlled environments. Its combination of heat resistance, mechanical durability, and flame retardancy makes it ideal for a range of residential, commercial, and industrial applications. Whether you're installing a 1AWG RHH cable for a subpanel or using RHH cable 2/0 in a high-capacity distribution system, this cable type ensures consistent, code-compliant results.
Typical Applications of RHH Kabel Include:
Power distribution panels in commercial and institutional buildings
Industrial control cabinets and electrical switchgear
Grounding and bonding systems for residential properties
Feeder circuits and subpanels within factories and large-scale facilities
OEM equipment wiring in dry, enclosed environments
Case Study 1: Using 1AWG RHH Cable in a Hospital Control Room
A hospital in Chicago required a reliable solution for rewiring its emergency power control room. The environment was dry, temperature-controlled, and densely packed with electrical panels. Engineers selected 1AWG RHH cable for its compact size, flame-retardant insulation, and UL-compliant specifications. The flexibility of the RHH kabel allowed for efficient routing through existing conduit systems without disrupting sensitive equipment. The installation passed all inspections and improved the hospital's power safety infrastructure significantly.
Case Study 2: Deploying RHH Cable 2/0 in a Manufacturing Plant Upgrade
A large manufacturing facility in Texas underwent an upgrade to its main electrical distribution network. For high-load feeders running from the main switchboard to subpanels, the engineering team used RHH cable 2/0. The choice was driven by the cable's 600V rating, 90°C temperature tolerance, and ability to perform in the facility's dry interior environment. The RHH kabel provided a durable, code-approved solution with minimal thermal derating, supporting increased production demands while meeting NEC standards.
4.RHH vs. RHW vs. RHW-2
It's important to differentiate between RHH cable and other similar types:
| Feature | RHH Cable | RHW Cable | RHW-2 Cable |
|---|---|---|---|
| Location | Dry only | Wet or dry | Wet, dry, or underground |
| Temperature | 90°C dry | 75°C wet/dry | 90°C all environments |
| Insulation Type | Thermoset rubber | Thermoset rubber | Thermoset rubber |
| Example | 1AWG RHH cable | RHW-2 2AWG | RHW-2 3/0AWG |
If you're considering a purchase, always verify whether rhh kabel is appropriate for your project's environmental conditions.
5.Benefits of Using RHH Cable
Choosing RHH cable, especially larger sizes like rhh cable 2/0, offers several long-term advantages:
Improved safety: Flame resistance reduces fire risk
Thermal stability: Ideal for areas with high ambient temperatures
Versatility: Used in everything from utility equipment to manufacturing facilities
UL Listed & NEC Compliant: Ensures regulatory approval for professional installations
Long service life: Durable even in harsh industrial environments
For mid-range applications, a 1awg rhh cable offers a great balance between flexibility and ampacity.
6.How to Select the Right RHH Cable
When choosing the right RHH kabel for your installation, consider the following:
Ampacity Requirements
Use an ampacity chart to select between rhh cable 2/0, 1awg rhh cable, or other sizes based on your system load.
Environmental Conditions
Only use RHH in dry indoor locations. For wet or underground, consider RHW-2.
Voltage Rating
Ensure your cable meets or exceeds the 600V system voltage.
Certifications
Look for UL and NEC compliance on the cable's packaging or datasheet.
Installation Method
Confirm whether the cable will be placed in conduit, panel boxes, or behind walls, as this may affect heat dissipation.
7.FAQs About RHH Cable
Q1: What does RHH stand for in cables?
A: RHH stands for Rubber-insulated, Heat-resistant, describing the cable's insulation type and temperature tolerance.
Q2: Can I use RHH cable outdoors?
A: No, RHH cables are designed for dry indoor use only. For outdoor or wet environments, use RHW or RHW-2.
Q3: What is the temperature rating of RHH cable 2/0?
A: Most RHH cable 2/0 is rated for 90°C in dry environments.
Q4: Is 1AWG RHH cable suitable for residential use?
A: Yes, 1AWG RHH cable can be used in residential panels and grounding systems as long as it's installed in dry, code-compliant environments.
Q5: Is "RHH kabel" the same as RHH cable?
A: Yes, "RHH kabel" is the German equivalent term for RHH cable, commonly used in European contexts or by international suppliers.
Dongguan Greater Wire & Cable Co., Ltd. products have been widely used in more than 20 countries in the Americas. We are well aware of local cable standards and industry trends. Relying on the UL certification system, we provide customers with cable solutions that truly meet market needs. Whether your business is in Central America, South America or North America, we can provide accurate services. Welcome to contact us for the most suitable product recommendations and cooperation quotations.