1. Max Ice™ Overhead Conductors

2. Extreme Ice: A Utility’s Nightmare
Ice buildup is defined by the following categories:
0” = NESC Light
1/4”= NESC Medium
1/2”= NESC Heavy
1/2” to 1”= “Extra Heavy”
1” and above: Extreme Ice
Changes in the environment and the increase of superstorms has led to utilities’ growing concerns about extreme ice
Typically occurs in areas of the extreme north, coastal regions and river crossings

3. Max Ice™ Overhead Conductors
The right stuff for the job
The Conducting Component
High-temperature-tolerant ZTAL AL-ZR alloy allows for thermal ratings of 210 °C continuous and 240 °C emergency
The Core Ultra-high-strength (UHS) steel allows for higher stringing tensions.
High elastic modulus of steel helps to limit sag under extreme ice loads.
The Coating
Mischmetal alloy combines high heat tolerance and excellent corrosion protection

4. Southwire Tested. Proven Reliable.
Max Ice™ Conductors stand up to the stress of extreme ice conditions
Smaller Conductor Size
Max Ice™ overhead conductors are half the size of the same capacity ACSR conductor
Results in less ice buildup, less sag, and less weight on transmission towers
Reduced Tower Height
Tower height and cost can be reduced as a result of less sag under extreme ice conditions than traditional overhead conductors
Thermal Rating
2100C continuous and 2400C emergency allows for greater capacity than standard ACSR
Same Hardware as ACSS
ACSS hardware and fittings can be used for Max Ice™ overhead conductors
Higher RBS with Less Sag
Under extreme ice conditions, Max Ice™ overhead conductors have only reached 70% of its RBS and have 5’ less sag than comparable conductors

5. Thermal sag (grey bar) is the same value shown on all prior charts
Thermal sag (grey bar) is the same value shown on all prior charts. Note Max Ice is still in last place for thermal sag, but now extreme ice governs the structure height requirement. Max Ice is best-in-class by a wide margin (see notes on next page)

6. Extreme Ice Performance
In areas where ice loads typically exceed 1”, ice load and sag govern the required structure height
With 2” ice load and 1200’ span, Max Ice™ overhead conductor
Has 5 ft less sag than comparable conductors
Requires 4,000 lb (13.5%) greater tension than comparable conductors
Is at 70% RBS with 2” ice weight , versus 80% RBS for the nearest competitor

7. A Full Range of Overhead Solutions
ACSR The most commonly used overhead transmission line for decades features variable steel core stranding for strength without sacrificing ampacity.
ACSS and ACSS/HS285®
High-strength steel core is stronger, has higher capacity and less sag than standard ACSR.
C7TM Overhead Conductor
Ultimate HTLS performance. Multi- stranded core for greater flexibility, reliability and ruggedness.
Max Ice™ Overhead Conductor
Designed to provide long spans with minimal sag or breakage during extreme ice conditions. 7